Echosounding
音响测深法
🗣️ 情景例句
He ventured his life to rescue a drowning child.
他冒着生命危险去抢救一个溺水的孩子。
Anger is a short madness.
发火是短暂的疯狂。
I see. I hope everything goes well. Bye!
我明白了。我希望你一切顺利。再见。