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A pot experiment in greenhouse was carried out to study seasonal variations of CH 4 fluxes from rice paddy soils and the effect of land management in winter crop season on the seasonal variations.

通过温室盆栽试验对水稻土CH4 排放的季节变化及冬作季节土地管理的影响进行了研究。

Finally, in additional to the comparison of results derived by PPP and DGPS, they were all compared to Anping tide gauge records as well. The aim of this study is the analysis of height variations provided by different methodologies. Comparing to Anping tide gauge records, the differences in height variations can achieve 4.5 cm with DGPS; 6 cm with final product; 10 cm with rapid product; 25 cm with ultra-rapid product; 1~2 m with ultra-rapid product.

实验中也搜集了安平潮位站的潮位资料，故也将此资料与GPS浮标高程方向定位成果进行比较，而研究中将著重於高程变化量之分析，假设潮位仪观测海水面高程变化量为参考解，由实验结果可发现差分相对定位椭球高变化量均方根误差之平均值约4.5公分；使用最终产品时椭球高变化量均方根误差之平均值可以达到6公分以内；使用快速产品时椭球高变化量均方根误差之平均值可以达到10公分以内；使用超快速产品观测部分於观测环境理想时椭球高变化量均方根误差之平均值可以达到25公分左右；使用超快速产品预估部分时椭球高变化量均方根误差之平均值约1~2公尺。

On the other hand, data analysis reveals that the ionosphere and its background thermosphere undergo numerous kinds of variations, i.e. the diurnal, day-to-day, semiannual and annual variations.

在另外一方面，大量的研究工作表明，在电离层及其背景大气中广泛存在着各种时间尺度的变化行为，例如典型的周日变化、逐日变化、准27天变化、半年变化、周年变化、准两年变化以及随太阳活动周期的11年、甚至更长周期的变化等等。

Similar views are expressed by other biologists (Bertalanffy, 1952). Simpson (1949) gives a beautiful example paralleling the great variations of fishes living in the identical environment: the horns of antelopes living in the Belgian Congo. Discussing the variations in shape, he says

其他的生物学家也有相似的看法(Bertalanffy， 1952)，Simpson (1949)对应於在相同环境下鱼类生长的差异，他给了我们这样一个完美的例子：生长在比利时刚果的羚羊与其羊角，他讨论了羊角形状的变异

This study investigates that the relationship between variations of sea ice in the Ross Sea and Weddell Sea and the synoptic variations during summer in China using Northern Hemisphere monthly mean 500 hPa and 100 hPa geopotential and rainfall and temperature data at 160 stations in China.

本文利用Hadley中心提供的1968年1月-2002年12月全球海冰密集度格点资料，结合中央气象台的北半球500hPa、100hPa高度场资料以及中国160站降水、温度资料，利用诊断分析方法，分别对南极Ross海区和Weddell海区海冰与我国夏季天气的关系进行了研究。

In evolutionary studies, because heritable non-genetic variations are often induced by the environment, we have to expand our notion of heredity and variation to include the inheritance of acquired variations, the once disparaged idea that was part of Lamarck's theory.

在进化研究中，因为可遗传的非基因变异通常是由环境引起的，所以我们应该将我们的遗传和变异概念扩大到包括获得性变异的遗传--这一被轻视的观点是让－巴提斯。拉马克（Jean-Baptiste Lamarck）理论的一部分。

There was a great number of different variations in this position.

在这一局面下有很多不同的变例。

Achievement of an absolute 0 VDC to 5 VDC input voltage range will therefore require a minimum supply voltage of 4.950 VDC over temperature variations, initial tolerance and loading.

一种绝对的0至5伏直流输入电压范围内实现将因此需要一个温度变化的4.950，初始误差和直流负荷最小电源电压。

Ammo, magazine, and grenade pouches, entrenching tool carriers, canteen covers and numerous other accouterments were made in innumerable variations with whatever materials were available.

弹药、弹药夹和手雷袋、挖壕的工具、饭盒盖和其他他用得到的任何种类难以数记军用装备。

If is a sequence constructed by the method of local variations, then any accumulation point of satisfies .

定理3.1。如果是用局部变量法构造的序列，则任何的聚点满足（假设至少是一次连续可导的

They have quite a lot of work to do.

他们有许多工作要做。

Let us give you a more elaborate example of this process.

让我们给你这个过程的更多的详细例子。