困难的工作

Of course, the mathematical proof of ergodicity, even in a hard ball system with only few degrees of freedom, is still a difficult task.

当然，即使对具有很少自由度的硬球系统，遍历性的数学证明也仍然是一件非常困难的工作。

Herriot loved the beautiful countryside , but treating large animals was very hard work .

赫里奥特喜爱美丽的农村，但医治大的动物是很困难的工作。

It is difficult to estimate indent depth in theory.

从理论上预测受静态压痕力作用的复合材料层压板的损伤参数是一项困难的工作。

When Melba fights for her rights, she realizes that it really is a difficult job, but also that someone has to do it, so why not her?

当梅尔巴为自己的权利斗争的时候，她意识到这是一个非常困难的工作，而且必须要有人去做，所以为什么她不自己做？

It is often difficult to work out whether your baby is hungry, cold, tired or in need of a nappy change.

这是往往是困难的工作，是否您的宝宝是饥饿，严寒，疲倦或在需要一个尿布的变化。

At the age of 23, Paganini composed the most difficult work for violin ever in the 24 Caprices.

在23岁，帕格尼尼组成的24首随想曲的小提琴最困难的工作下去。

However, it is a very difficult work to detect these periodic orbits due to their unstable properties.

然而，由于这些周期轨道本身具有的不稳定性，对它们的探测成为一件较困难的工作。

It is quite complex and difficult to simulate bolt pretension accurately in the analysis of bolt joint by finite element method.

在螺栓联接的有限元分析中准确模拟螺栓的预紧力是一项复杂而困难的工作。

And then there's a lot of hard work preparing his Sunday sermon.

然后就是准备他的周日的证道，一项很困难的工作。

Parameter's calibrations of watershed hydrologic forecasting models and flood real-time correction are very important and difficult jobs.

流域水文预报模型的参数率定和实时洪水校正是洪水预报中非常重要和困难的工作。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。