无偿的
n. volunteer
adj. voluntary ; gratuitous
双语例句原声例句
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我知道他的帮助不会是无偿的。
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甚至无偿的慈善工作也好过没事可做。
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今天大多数白人享有的不成比例的财富，最初是由几个世纪以来无偿的黑人劳工创造出来的。
The disproportionate wealth that most whites enjoy today was first constructed from centuries of unpaid black labor.
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First, free velocity, constant velocity can be obtained for free without doing anything.
首先,速度是无偿的,恒定速度不需外力作用就能无偿获得
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