Leucodermia
白斑病
🗣️ 情景例句
Hi, Mr. Stewart.
嗨， Stewart先生。
Don't swap horses when crossing a stream.
行至中流不换马；危难之时不宜作大变动。
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。