Night work has even been classified by some medical groups as a risk factor for many cancers.

一些医学团体甚至将夜间工作列为许多癌症危险因素。

" He wanted to know about some night work, " he explained, turning to his companions.

“想知道一些夜间工作， ” 解释说，转同伴。

Unlike optical technology which produces the best images on sunny days, SAR penetrates clouds and works at night.

与在晴天产生最佳图像学技术不同，SAR 可穿透云层并在夜间工作。

How does the Chinese contractor solve the problem of working at night in a country where local workers usually work at daytime?

承包商如何解决当地工人常在白天工作家夜间工作问题？

The Unquenchables had done their best to be worthy of the name, for like elves they had worked by night and conjured up a comical surprise.

Unquenchables 已尽最大努力配得上这个名字，因为们像精灵一样在夜间工作，并创造了一个滑稽惊喜。

This act also  declared that anyone under the age of 18 was no longer allowed to work at night, and that  their employers had to give them an hour's lunch break, so some progress  was made during this time.

该法案还宣布，任何未满 18 岁人不得再在夜间工作，并且雇主必须给们一个小时午休时间，因此在这段时间取得了一些进展。