查询词典 come to a period

The time of the pedogenic process was in the last ice age, therefore this area was colder and drier in climate and lower in sea level than today. The main chemical process in the soil was oxidation, a period of the formation of oxide minerals such as limonite. With the deposition and covering of the marine facies layer in the postglacial period, the soil turned into diagenetic process. Consequently the chemical process in the soil was dominated by reduction and this process was the main development period for nodules of iron-manganese carbonate to form.

成土期处于末次冰期低海面、气候寒冷干燥期，土壤的化学过程是以氧化作用为主，是褐铁矿等氧化性矿物形成时期；冰后期海相层的沉积覆盖使土壤层进入成者阶段，土壤层的化学过程以还原作用为主，成岩过程是铁锰碳酸盆结核的主要生成期。

Initially established during the Preclassic period, many of these reached their apogee of development during the Classic period ,and continued throughout the Post classic period until the arrival of the Spanish.

玛雅文化最初开始于先古时期，其主要的成就高峰均出现于古典时期，并将辉煌延续到了整个后古典时期，直到西班牙人的到来。

At the same time, the historical term "technology" in the prehistorical civilization period, ancient civilization period, the axial period and the era of technology and science is carefully explored.

雅斯贝斯从文明形态的角度对历史进行分期，并对史前期文明、古代文明时期、轴心期、以及科学技术时代中技术这一历史现象进行了深入探究。

Based on the definitions of air conditioning period, dehumidifying period and heating period, this paper puts forward the exchanging conditions and psychrometric process of ventilation system in residences.

根据夏热冬冷地区的空调期、除湿期和采暖期的划分方法，提出了住宅建筑新风系统全年运行的转换条件，以及新风热湿处理工况要求。

Except 58 cases missed and 5 cases induced abortion, we followed up 163 cases(241 kidneys) in different gestational age and postnatal period. Among them, 209 kidneys (86.72%) were discovered pyelectasis between 5mm to l0mm. The pyelectasis of 30 kidneys(12.45%) was between l0mm to l5mm, and that of 2 kidneys(0.83%) was thicker than 15mm. Follow-up result is as follow: 137 cases(214 kidneys) were recovered in normal in fetus period or postnatal 15 months. Their pyelectasis was thinner than 5mm(88.80%). Among them, 16 cases(2l kidneys) were recovered in fetus period(8.71%). 121 cases(193 kidneys) were recovered in postnatal 15 months(80.09%). The rest 20 kidneys' pyelectasis was between 5mm to l0mm(8.30%). 4 kidneys' pyelectatis was between 10mm to l5mm(1.66%), and 3 kidneys' pyelectasis was thicker than l5mm(1.24%).

结果：发现一侧或双侧肾盂扩张≥5mm的胎儿有226例，除58例失访，5例引产外，对163例241只肾脏在不同孕龄及出生后的孩子进行了随访。241只肾脏按肾盂扩张在5~10mm间2的只（占86.72%），在10~15mm间30只（占12.45%），≥15mm者2只（占0.83%）分组观察，随访结局如下：137例214只肾盂在胎儿期或孩子出生后15个月内恢复正常，肾盂扩张＜5mm（占88.80%）：其中16例21只肾盂在胎儿期恢复至5mm以下（占8.71%），121例193只肾盂在孩子出生后15个月内恢复至5mm以下（占80.09）。20只肾盂扩张在5~10mm间（占8.30%）。4只肾盂扩张在10~15mm间（占1.66%）。3只肾盂扩张≥15mm（占1.24%）。

In swap market, the innovated swap means are the multi-period forward established extending means, multi-period and multi-cost forward established extending means, multi-period forward option extending means, the recollectable extending means, the changeable principal extending means, the negotiated price extending means, the retail price extending means, the average price extending means, the elastic extending means, the price ceiling extending means.

在掉期市场上，商品生产者可采用多期远期启动掉期方式，多期多值远期启动掉期方式，多期远期期权掉期方式，可回收的掉期、本金可变式掉期、议价掉期、零息掉期、均价掉期、伸缩型掉期、价格上限掉期等方式。

The recurrency period is still 24 months. However, there is now provision for a 3-month "window" that allows for recurrent training conducted within the final 3 months of the 24-month period to be considered to have been completed on the expiry date of the 24-month period.

复训周期仍然是24个日历月，但是，新规定了一个3个月的&窗口&，即允许在培训到期前的3个月内进行复训，即被认为在到期日完成了复训。

According to seasonal change of soil moisture, it can be divided into stable period , consumptive period (June-September) and slow restorable period (September-October).

各植物群落土壤水分亏缺可分为重度、中度和轻度亏缺三种类型，且其季节变化明显；群落对土壤水分亏缺的适应对策因植物种而异。

The testis index, testis volumes were same as the annual changes of testis mass. The curves of annual variation were all unimodality.2 The spermatogenetic cycle of Myospalax cansus comprises seven stages with significant features: Stage I , from February to April, the testis were at the stage of spermatogonia proliferation. In this period, testis index and the number of spermatogonia began to rise. Other spermatogenic cells had not yet formed; Stage II to III, from March to April, primary spermatocyte meiosis period. The testis index was highest in this stage, and spermatogenic cells were in spermatocyte stage, the primary spermatocyte meiosis generated to secondary spermatocyte; Stage IV, from April to May, spermatocytes continued to split, germ cells appeared in seminiferous tubules; Stage V, in May, sperm formation, spermatids of seminiferous tubules were transformed to spermatozoa, a large number of sperms existed in the lumen; Stage VI, spermatozoa emission period, from May to June, testis index were a significant drop and mature spermatozoa excluded gradually; VII, the testicular activity ceased basically from July to September, November to January of the following year, the spermatogenic activity ceased completely. Therefore, Myospalax cansus are animals of seasonal reproduction, spermatogenesis cycle is discontinuous type.

睾丸系数、体积和重量的年周期变化规律一致，变化曲线呈现单峰型。2甘肃鼢鼠雄性生殖腺的年周期活动由7个特征明显的时期构成：Ⅰ期，2～3月份，精原细胞增殖期，睾丸系数开始上升，精原细胞进行有丝分裂，其他生精细胞尚未形成；3～4月份为Ⅱ～Ⅲ期，初级精母细胞成熟分裂期，睾丸系数达到最大，生精细胞大多处于精母细胞阶段，初级精母细胞减数分裂生成次级精母细胞；Ⅳ期，4～5月份精母细胞继续进行分裂，精细胞在生精小管内出现；Ⅴ期，5月份，精子形成期，曲细精管中精细胞变态成精子，在管腔中存在大量的精子；Ⅵ期，精子排放期，5～6月份，睾丸系数显著下降，成熟精子从生精小管上脱离，逐渐排除；Ⅶ期，精原细胞停滞期，7～9月份睾丸生精活动基本停滞，11～翌年1月，生精活动完全停止。

The Es formation was divided into seven third order sequences based on the seismic, drilling and logging data, and plans deposition system plane distribution maps of different time were plotted by dominance phase principle. The lower Es4 is flood-overlake facies mainly; the upper Es4 is meandering stream and braided river delta deposition above the shore shallow lake background; in the Es3 period, the south mainly developed braided river, meandering stream delta, the northeast area main developed meandering stream delta, the middle area mainly developed semi-deep lakean d deep lake sediments. From lower Es3 to upper Es3, the delta scale gradually increased and the depositional area gradually moved to the east and the southeast; the Es2 period was dominated by shore-shallow lake sediments and widely developed braided river delta and delta deposits; the Es1 period was dominated by shore-shallow lake shoal deposits, and in the south developed meandering stream and braided river delta deposits.The lothological traps of the Shahejie group are mainly fluxoturbidite and stratum lateral pinch-out, and its formation and the distribution of the lothological trap were controlled mainly by the basin structure characteristic, palaeogeomorphology and tectonic activity and so on. It had a beneficial geological condition to develope sublacustrine slump turbidite fans in Jishan, Jiangjiadian and Wawu.

利用地震、钻井、测井等资料，将古近系沙河街组划分出7个三级层序，通过剖面沉积学分析，以优势相原则绘制不同时期各亚段沉积体系平面分布图：沙四下总体以洪水-漫湖沉积为特征，沙四上沉积时期是在滨浅湖背景之上发育了曲流河三角洲和辫状河三角洲沉积；沙三段沉积时期南部主要发育辫状河、曲流河三角洲，西北部地区发育曲流河三角洲，中部地区主要为深湖—半深湖沉积；由沙三下至沙三上，西北部三角洲规模逐渐增大，沉积范围逐渐向东、东南方向推进；沙二段沉积时期为滨浅湖沉积，在背景之上广泛发育了辫状河三角洲和三角洲沉积；沙一段以滨浅湖滩坝沉积为特征，南部发育了曲流河三角洲和辫状河三角洲沉积；沉积地层中的岩性圈闭以滑塌浊积岩岩性圈闭和地层侧向尖灭型岩性圈闭为主，其形成和分布主要受盆地结构、沉积古地貌和构造活动强度等因素控制，北部基山、南部江家店和瓦屋具有发育滑塌浊积扇的良好地质条件。

According to our present broadcasting situation,the thesis proposes using new technology to update and reform the present HFC. It also suggests broadcasting using self-advantage and arranging EPON in order to win the supermarket.

论文从我国广电的现状出发，结合实际，积极倡导采用新技术更新、改造我国现有的HFC网络；倡导广电现阶段利用自身优势，部署EPON网络来赢取市场。

A new general kinetic equation was derived in which the effect of the removal of condensation water was taken into account completely, and was applied to the polyesterification kinetic study of AA/HPHP and AA/NPG. It was found that the reaction order of self-catalyzed polyesterification was not constant. For these polyesterifications, the reaction order was 2.5 at a low temperature, while 3.0 at a high temperature.

考虑缩合水的排除对反应体系的影响，用体积浓度单位推导出一个新的聚酯反应总包动力学方程，并应用到AA/HPHP和AA/NPG两个聚酯化反应的动力学研究中，研究发现，自催化聚酯反应的反应级数并不是固定值，对于AA/HPHP和AA/NPG两个聚酯化反应而言，低温时反应级数为2.5，高温时反应级数为3.0。