其密封性直接影响到模拟器模拟太空冷黑环境的好坏，对漏率的要求非常高，因此对热沉在加工过程中的检漏提出了非常苛刻的要求。

So, the requirements for leakage rate is very strict to the heat sink, especially the severe requirement for leakage detection during its fabricating process.

youdao

我6点30分醒来时，天又冷又黑。

It was cold and dark when I woke at 6:30.

《柯林斯英汉双解大词典》

墙又黑又冷，上面满是黏湿的污迹。

The walls were black, cold and slimy.

《牛津词典》

In December, it's cold, it's dark.

十二月很冷，天色也黑。

我来自阿拉斯加 - SpeakingMax英语口语达人