拼音：kěn gǔ tóu
啃骨头 kěn gú tou
(1) [gnaw a bone;pick a bone]∶用牙剥食骨头上的肉那只狗在啃骨头(2) [a job that was difficult and not very profitable]∶比喻难做的而又没有什么油水的工作，常和“吃肉”对举吃肉和啃骨头的事都得干
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