Pmmu
[计] 页式存储器管理部件
🗣️ 情景例句
Tomorrow.
明天。
It was after dark when we got back,and we were all tired.
我们回来时天已经黑了，并且我们都很疲倦。
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。