Maintenance system
[计] 维护系统
🧩 词语组成解析
🗣️ 情景例句
I talked with him, and he understands completely.
我与他谈了 ，他完全了解。
When did you go painting?
你什么时候去画画？
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。