盒子内部是一台空气压缩机和一台真空泵。

Inside the cabinet are an air compressor and a vacuum pump.

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一个生锈盒子里装着一台真空泵，用来捕获喷气孔冒出的烟羽。

A vacuum pump, housed in a rusty ammo box, captured a fumarole's plume.

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安装一台血泵或人造心脏不太可能成为心脏疾病的主流治疗技术。

Installing a pump or an artificial heart is not likely to become mainstream treatment for heart disease.

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