Fers
abbr. facility error recognition system 设备差错识别系统
🗣️ 情景例句
since this is so easy ....
既然那么简单……
Work has a bitter root but sweet fruit.
劳动根虽苦，然而果实甜。
and we have only to turn to that extraordinary discovery of echo-location in bats to see a case in which the voice plays a strictly utilitarian role.
我们只要看一看蝙蝠回声定位这一极不寻常的发现，就可以探究一下声音在什么情况下有绝对的实用价值。