吃透英语课本，提升在校竞争力
v. 啃；咬；啮；折磨；侵蚀
现在分词：gnawing
第三人称单数：gnaws
过去式：gnawed
过去分词：gnawed
过去分词：gnawn
A rat had gnawed a hole in the box.
老鼠在箱子上咬了一个洞。
Dexter gnawed his pen thoughtfully.
德克斯特若有所思地咬着钢笔。
gnaw at
啃，咬；侵蚀
vi.咬；折磨；侵蚀
bite
grind down
vt.咬；折磨；侵蚀
harry
worry
trouble
weather
tear
