... let down 放下（窗帘），失望 let off 燃放鞭炮，放掉蒸汽，放过某人 let out 放掉气，发出响声，泄露 ...
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... blow off one's dogs 放弃要做的事业... blow off steam 放掉蒸汽 blow one's head off 自杀 ...
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放掉蒸汽
Blow off steam
以上为机器翻译结果，长、整句建议使用 人工翻译 。
拿开装奶沫的壶，放掉咖啡机蒸汽。
Take the jar away and let out all the steam.
youdao
本发明系统中蒸汽中的能量不仅没有被白白释放掉，而且还通过热泵从外界获取了大量能源。
Energy in the steam in the system of the invention is not released in vain, and a great quantity of energy is obtained from outside by the heat pump.
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