Cims
计算机集成制造系统
🗣️ 情景例句
All window seats are sold out.
所有靠窗口的位子都卖光了。
It is the first step that costs.
万事开头难。
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。