🗣️ 情景例句
Lacks courtesy is ill-mannered.
不礼貌，举止不当。
The short boy tried to peer over the desktop.
矮个子的男孩挣扎着要看到桌子的上面（有什么）。
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。