Dsip
[化] δ-促睡眠肽
🗣️ 情景例句
Hi.
嗨。
Do you ever go swimming on the weekend?
你曾经在周末去游泳吗？
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。