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There are great differences in chemical mobility of fluorine in stone coal of different geological periods.

5大巴山地区不同时代的石煤中氟的化学活动性具有较大差异。

Effects of grafting on chlorophyll fluorescence parameters were investigated with PAM-2100 chlorophyll fluorometer in different periods after planting (20, 30, 45 and 60 days).

选取薄皮甜瓜品种'金蜜'为接穗，南瓜品种'圣砧1号'为砧木，以自根苗为对照，用PAM-2100型叶绿素荧光仪于定植后20、30、45、60d测定其叶绿素荧光参数。

With a large turnover of migratory water bird species during migration periods, Ras Al Khor is a key refueling point for birds using the west Asian Flyway.

在鸟类迁徙季节，大量的迁徙水鸟回迁于此。它是西亚线迁飞候鸟重要的能量补充站。

Focusing on your goal for long periods of time can be difficult and challenging.

长时间的考虑你的目标是痛苦的和有挑战性的。

While finding so many juxtaposed periods at Fontainebleau, I could not fail to appreciate the charm of this overall effect.

在枫丹白露看到这么多并列交错时期的产物，我对其整体效果的魅力倍加欣赏。

The average increase in the damping over the analysed time periods of imperfect walking was up to 10 times higher than the damping of an empty footbridge.

中的平均增长阻尼比分析的时间段不完全走路是高达10倍，阻尼一个空的行人天桥。

Considered from a long period of time, the function and force is different in different periods.

而在推动和影响中国早期城市发展演变的诸多因素中，有三种因素占主要地位，即政治、经济和地理。

Company's performance and when planning and forecasting future periods.

公司的业绩时，规划和预测，今后一个时期。

Even during the darkest periods in my life it has always been a foregone conclusion for me that God exists.

即使在最黑暗的时期，我的生活一直定局对我来说，上帝的存在。

Development period of the parasitoid pupa from the 5th instar larva fed on MSB was significantly longer. Length of cocoon of MSB treatment was significantly shorter than the control. However, no obvious differences were detected in the development periods of egg to larva, cocoon mass size, wasp emergence rate, sex ratio, longevity and forewing length of wasp between KMD1 and the control. 3. Amino acid content in the haemolymph of SSB after fed with transgenic rice Although there were no changes on the components of amino acids in the haemolymph of SSB after fed with two transgenic rice lines, there were some changes on relative contents of amino acids.

取食KMD1 36h后0天，20种氨基酸中除天门冬酰胺、丝氨酸、苏氨酸和甲硫氨酸外，其它16种氨基酸的含量都高于对照，其中组氨酸、甘氨酸、苯丙氨酸、异亮氨酸、赖氨酸差异达显著水平，谷氨酰胺、脯氨酸差异达极显著水平，与氨基酸总量表现一致的变化趋势；取食KMD1后1天，除天门冬酰胺、谷氨酰胺和赖氨酸高于对照外，其它17种氨基酸均较对照低，但仅丝氨酸、苏氨酸和色氨酸与对照差异显著；取食KMD1后3天，绝大多数氨基酸含量的变化与取食KMD1后0天的趋势一致，除丙氨酸和色氨酸比对照稍低，其它18种氨基酸均高于对照，其中精氨酸、缬氨酸差异显著，丝氨酸差异达极显著。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。