词汇精选：gnaw的用法和辨析
一、详细释义：
v.
咬，啃，啮 [I,T]
例句：
Lions like to gnaw away at a piece of meat.
狮子喜欢不断地啃着一块肉。
例句：
Rats gnawed off the lid of the box.
老鼠咬开了盒盖。
侵蚀，使腐蚀 [I,T]
例句：
This kind of roads gnaw at the tires
这种道路磨损轮胎。
例句：
The acid gnaws the metal.
酸腐蚀金属。
折磨，使苦恼，使不安 [I,T]
例句：
These desires gnawed away at us constantly.
这些欲望不断地折磨我们。
例句：
Doubts were already gnawing away at the back of his mind.
心底的疑团已经开始困扰他。
二、词义辨析：
bite,chew,gnaw,snap
这些动词均含有“咬、啃”之意。bite指用牙齿钳住或切断，或咬一口。chew指用牙磨碎。gnaw指连续不断用齿咬。snap指突然猛咬。
三、相关短语：
gnaw at
v. 啃,咬,侵蚀
四、参考例句：
Lions like to gnaw away at a piece of meat.
狮子喜欢不断地啃着一块肉。
Self-doubt began to gnaw away at her confidence.
对自己的怀疑渐渐吞噬了她的自信心。
This kind of roads gnaw at the tires
这种道路磨损轮胎。
Woodlice attack living plants and gnaw at the stems.
木虱会侵害活体植物并啃咬它们的茎。
