Ligula
n. [动] (昆虫的)唇舌
🔁 扩展释义
【医】 第四脑室带
🗣️ 情景例句
They'll be at your door within a few minutes.
他们会尽快送到你的门口。
He that is master must serve.
主人必须会服务。
and by measuring the time interval between the taps and the receipt of the echoes, the depth of the sea at that point can be calculated.
测出回声间隔的时间，便可算出该处海洋的深度。