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层滤机
🗣️ 情景例句
She is dying to know where you've been.
她极想知道你到哪去了。
He is distinguished as an economist.
他是一名著名的经济学家。
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。