turn a hand to 着手做
When we were all hurrying to get the house ready for company, Mary sat reading and wouldn't turn a hand.
我们为客人来访忙着布置屋子,玛丽却坐着看书,一点忙也不愿帮。
You can't do a right-hand turn here.
你不能在这里右转弯。
According to his calculations, a little helping hand would turn the Earth's magnetic field into a conveyor belt that would vent the gas into outer space, whence it would never return.
通过他的计算,只要施加一点小小的帮助,就能将地球的磁场变成一个将气体排放到外太空并且永不能返回的传输带。
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