The advantage of simpler tools is that they are resting on much more established technologies.

简单工具的优点是，它们都基于许多已经被普遍接受的技术之上。

youdao

Fish that use electric fields to sense their environments dim their signals to save energy during the day when they are resting.

线鳍电鳗（Sternopygus macrurus）是种使用电场感知周边环境的鱼类，在休息的时候会减弱信号以节约能量。

youdao

Mixed flocks of several species often travel together, but when they are feeding or resting you will spot different birds on the ground, at mid-level heights and at the tree tops.

很多种鸟常常混群共同迁徙，但是当他们停下来觅食休息的时候，你就会发现不同的种类有的在地面上，有的在中层高度，有的则在树顶处。

youdao

None of the resting workers yet know when they'll be going back to work, and some are now beginning to worry that their livelihoods may be sacrificed in China's bid to clean up its environment before it is too late.

NPR: Some Economies Suffer As Beijing Cleans Up Air