Securitron
电子防护系统
🗣️ 情景例句
He's not breathing, Philip!
他停止呼吸了 ，Philip。
I appreciate your helping me.
感谢你的帮助。
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。