work your fingers to the bone 刻苦工作;
例如:My father worked his fingers to the bone to provide for our family and send me to college. 为了养家糊口,以及送我上大学,我父亲极为刻苦地工作。
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再如:You work your fingers to the bone and the deed is done. But the fruit will fall to someone else's hand. 你十分刻苦地工作,一切都就绪了,可是成果却落入他人之手。