查询词典 reproduction

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。

Spinulosa decreased significantly when the water depth was more than 2 meters, as well as the sexual reproduction strategy of V.

随着水位的变化，有性繁殖体的投资比率发生变化，从水深1.4 m的2.77% 0.96%到水深2 m的0.13% 0.22%；而无性分株繁殖方式水深2 m以下没有显著差异。

In order to investigate the effects of different shading levels (Shading levels were: control 0, 50%, 80%, 90%) on the trade-off relations between sexual reproduction and clonal multiplication of Vallisneria spinulosa, a natural greenhouse experiment was carried out by winter tuber of Vallisneria spinulosa being collected from Poyang Lake in the Jiangxi Province.

以采自江西鄱阳湖的刺苦草冬芽为实验材料，在自然温室中经历了全不遮阳、部分遮阳等4种处理，研究不同遮阳处理产生的光线差异对刺苦草的有性繁殖和无性繁殖方式的资源配制的影响。

Stellaria ; Population ; Morphological variation ; Mode of reproduction ; Ecological adaptation

繁缕属；群体；形态变异；繁殖方式；生态适应

The aim of the paper is to examine the issue of globalizing cities in Taiwan via the geographical lens of social reproduction in everyday life. In order to explore the interrelationship between global production and local consumption, the discussion is focused on the structuration dynamics of Taipei's food markets and the associated retail changes.

本文试图跳脱经济台湾与产业台北的生产观点，改由日常生活的再生产观点来理解全球化城市的发展课题，并且从日常食物采买与菜市场发展之间的多重结构化历程来探讨生产与消费、地方与全球之间的复杂关系，以作为重新思考台湾城市发展的基础。

With increasing altitude,pollen numberdecreased and length of stylar ramification increased gradually.Increased stylarramification of plants of Saussurea with increasing altitude has importantadaptive significance of evolutionary ecology.It ensured sexsual reproductivesuccess,provided a foundation of hereditary variation and increased specificdiversity.In addition,asexsual reproduction of most species of Saussurea assuredindividual quantity.

根据我们调查，生活在青藏高原东缘的多数风毛菊属植物都具有无性繁殖方式，它保证了风毛菊属植物物种的个体数量，而花柱分枝的变长保证了风毛菊属植物的有性繁殖成功，为风毛菊属植物在该地区的进化提供了遗传变异的基础，增加了风毛菊属植物的物种多样性，使得风毛菊属植物的多数物种都成为该地区的常见种，也可能是青藏高原地区是风毛菊属植物的现代分布中心的原因之一。19。

Babies born very prematurely -- from 22 to 27 weeks of pregnancy -- had the 你好ghest risk of death throughout c你好ldhood. The risk persisted for girls until about age 6 and for boys up to about age 13, Swamy said. Swamy said the researchers also looked at reproduction rates as adults as an indicator of overall health.

Swamy说，生人很早的乳儿（有身22～27周生人的）在全般儿童期间都有很是高的死亡人数的比率；对女孩儿来讲，这个危险持续到6岁，对男孩儿来讲，这个危险要持续到大概13岁；研究者也不雅BeiJing房产网察了作为全般健康指标之一的成人孕育成功率。

The effects of the rare earth La2O3 on growth and reproduction of Tenebrio molitor L.

制备每kg麦麸分别含10，20，30，40.50，60，100，150，200和300mg氧化镧的饲料，用这10种剂量的饲料分别连续饲喂1日龄的黄粉虫Tenebrio molitor L。

Abstracts: In order to study the factors that cause the outbreak of Tetranychus turkestani, an important pest mite in Xinjian, the life history, reproduction ability and life table of T.turkestani were studied under the different temperatures in the laboratory.

为了研究新疆农作物重要害螨土耳其斯坦叶螨Tetranychus turkestani Ugarov et Nikolski的暴发原因，在实验室条件下研究了土耳其斯坦叶螨在不同温度条件下的生活史，生殖力，实验种群生命表。

Not long time later, due to the continuous migration and not-stop reproduction, the microbial thalli were distributed widely in the confine between the initial places and the oil-water interface.

可视化实验表明，由于不断的运移和不停的繁殖，在微生物初始位置与油水界面之间的范围内，广泛地分布着微生物菌体。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷