Epitheca
[植]上壳, [动]上壳, 外鞘(腔肠动物)
🗣️ 情景例句
Oh, here he comes.
噢，他来了。
How well do you know French?
你法语好吗？
So was born the echo-sounding apparatus, now in general use in ships.
这样就产生了目前各种船舶上普遍应用的回声探测仪。