Neopterygian
新鳍亚纲的鱼
🗣️ 情景例句
Fine, thank you.
很好， 谢谢。
Should I go this way,or that way?
我应该这样去,还是那样？
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。