Dynatron
n. 回射电子管, 介子\\n[电] 负特性管
🗣️ 情景例句
We'll find the owner.
我们会找到狗的主人的。
Self-trust is the essence of heroism.
自信为英雄品质之本。
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。