v.咬( gnaw的过去式和过去分词 );(长时间) 折磨某人;(使)苦恼;(长时间)危害某事物;
例句:
The rat gnawed a hole in the wooden box.
老鼠在木箱子上咬了个洞.
Rats have gnawed a hole.
老鼠咬了个洞.
The rats had gnawed some of the wood work away.
老鼠将一些木器咬坏了.