名词
中文翻译：直接蒸汽
同义词：
['Direct steam', 'Direct heat', 'Direct heating']
例句：
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1. The directsteam from the boiler is used to preheat the air before it enters the room.
锅炉产生的直接蒸汽用于预热进入房间的空气。
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2. The direct steam from the generator provides a high-pressure water supply for the plant.
发电机产生的直接蒸汽为工厂提供高压水供应。
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3. In some cases, direct steam can be used to remove impurities from the liquid being treated.
在某些情况下，可以直接使用蒸汽来去除待处理液体中的杂质。