Building a city can be a disaster for the environment.
新建一个城市对于环境来说可能是一场灾难。
A woman's work is never at an end.
妇女的活计做不完。
Once we detected a planet, we would have to find a way of blotting out the light from its star, so that we would be able to 'see' the planet properly and analyze its atmosphere.