The engine is letting off steam to relieve the pressure in the boiler.
机车在放蒸汽, 减少锅炉的气压。
He let off steam by yelling at a clerk.
他对一大喊大叫, 借发泄怒气。
The janitor let off some steam because the pressure was too high.
锅炉工把蒸汽放走了一点,因为压力过高。
They let off their guns at the British ships.
他对英国船舶开炮。
He lets off steam by going to the gym after work.
他下班后去体育馆锻炼，舒缓压力。
A bowman can let off six aimed shots in a minute, an arquebusier only one in two or three minutes, when he has gone through all his manual exercise carefully.
减少锅炉的气压。
大喊大叫, 借
对英国船舶
钟瞄准射击六次，而一名火绳枪手只能
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