时段

Wetland reduces 263122.5 hm2 from 1954 to 2000. The cultivated land increase engrosses lots of grassland and wetland; the woodland decreases except from 1954 to 1976;the village and town construction expands.

结果表明：整个时段耕地和城乡用地面积增加，草地和沼泽湿地面积减少，林地和水域除1954～1976年呈增加外，其他时段呈现减少的趋势。

Many good shows are getting the boot while reality trash monopolizes the prime-time time slots .

许多很好的显示，越来越开机，而现实的垃圾桶垄断的黄金时段的时段。

A multi-period reactive power optimization method based on two-layer genetic algorithm is presented,which recasts the complex reactive power optimization problem into a parallel processing problem of multi-period static reactive power optimization.

提出了一种基于两层遗传算法的多时段无功优化方法，将复杂的无功优化问题转化为多个时段静态无功优化的并行处理问题。

It also eliminates the invalid paths between statuses considering the restriction of minimum continuous time of on and off , and tamps rates , thereby reducing the number of paths in dynamic programming and attaining the aim of reducing dimensions . After confirming the running or suspended status of units , the approach is used to distribute powers among units , thereby increasing the efficiency of dynamic programming greatly .

通过比较各时段负荷及机组参数，剔除各时段下不满足要求的组合状态，从而减少动态规划中的状态点数；根据机组的最小连续运行，停运时间限制，计及机组功率上升，下降速度的约束，剔除了状态点间的无效路径，从而减少了动态规划的路径个数，达到降维的目的；在确定机组启停状态后，再采用解析法进行机组的功率分配，可以大大提高动态规划方法的效率。

Board of inquiry chose 18 monitoring point in Beijing high street, undertook in different period of time ill other people detects respectively, as a result discovery is nodded every almost inside heavy traffic period of time, carbon monoxide 、 always volatilizes the harmful thing such as organic matter is great degree all exceed national level.

调查组在北京主要街道选择了18个监测点，分别在不同时段进行了有害物检测，结果发现几乎每个点在交通拥挤时段内，一氧化碳、总挥发有机物等有害物浓度均超过国家标准。

METHODS: Spleen cells of 1, 2, 4, 6, 8, 10, 12, 16, 20 and 24 h in the coculture system were observed and the expression of RNA editase was detected by semiquantitative PCR and was contrasted with the mouse spleen cells in a singleculture system. The mouse model with the immune system restrained by FK506 was made, its spleen cells were cocultured with stimulated cells and then the effect of FK506 on RNA expression of editase was detected by semiquantitative PCR.

观察共培养1，2，4，6，8，10，12，16，20及24 h的小鼠脾细胞，用半定量PCR的方法检测RNA编辑酶表达的变化，并以相同时段单独培养的小鼠脾细胞RNA编辑酶的表达情况进行对照；制备免疫功能受FK506抑制的小鼠模型，取其脾细胞与刺激细胞进行相同时段的共培养，用半定量PCR的方法检测FK506对脾细胞RNA编辑酶的影响。

The results show that the hal＆daily and half-monthly tidal wave perio- dicity changed abnormally about one month before the earthquake, with periodicity disappearing and amplitude reducing, but they recovered after it with clearer state than that at normal time.

分析了在2004年12月26日印尼8.7级地震前河北昌黎台记录到的自然电位及电场异常，结果显示昌黎台自电位、电场正常时段观测到的半日、半月潮汐波周期变化在震前1个多月发生畸变，周期消失，变化幅度相应减小，震后快速恢复，且潮汐波记录比震前正常时段更加清晰。

At mid latitude, most negative phase onsets are within the night to early morning sector, and they are rarely occurred in the noon and afternoon sectors.

在东亚扇区，中纬区负暴开始时间主要分布在夜间及清晨时段，且在正午至午后时段极少发生。

At low latitude, positive phase onsets commence most frequently in the local daytime sector, also they commence a lot at 18~21 LT.

低纬区正暴开始时间主要发生在白天时段，且在夜间18~21 LT时段也易发生正暴。

Satelliate altimetery data compared with the data of Wusong tide gauge data , LianyunGang tide gauge data ,as well as five tide gauge data in middle north of Jiangsu, It verifies that it is feasible to separate sea surface and land surface absolute changes using T/P satellite altimerer data compared with tide gauge data at the same time. Moreover, it discusses absolute land change in the middle of Jiangsu in recent 10 years.

此外，通过卫星测高获得的绝对海面变化速率与同时段的吴淞验潮站、连云港验潮站以及江苏中部其他5个验潮站数据的对比分析，论证了利用T/P卫星测高数据与同区段、同时段验潮站数据对比来分离海面、地面绝对变化的可行性；并且对苏北沿海近10年米的地面绝对升降问题进行了探讨，获得了一些新的认识。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失