Prepump
前级泵, 预抽泵
🗣️ 情景例句
Well, what do you say we get back to our fishing?
你们说， 我们回去钓鱼怎样？
I left the house at 8 o'clock and got to work at 8:30.
我在8点钟离开了房子并且在8:30上班了。
It was the idea of supporting a craft on a 'pad',or cushion, of low-pressure air, ringed with a curtain of higher pressure air.
用一个气垫来支撑船体，低压空或软垫，软垫周围用高压空气环绕。