Firebreak
n. 防火障
✅ 同义词
🗣️ 情景例句
How do you want your hot dogs?
你的热狗想要什么调料？
To run for freedom
为求自由而逃跑
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。