A dog gnaws (at) a bone. 狗啃骨头gnaw a hole through wood 在木材上咬个洞gnaw one's way into a box 啃穿箱子而进到里面.
an illness gnawing (at) his life 消耗着他生命的疾病.
过去式:gnawed过去分词:gnawed, gnawn
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