worry at
phrasal verbworry at something
- to bite something and shake or pull it
咬;撕扯;摇晃;拉扯 - Rebecca worried at her lip.
丽贝卡咬着嘴唇。 - He began to worry at the knot in the cord.
他开始解绳子上的结。
- Rebecca worried at her lip.
- to think about a problem a lot and try and find a solution
思考,苦想(解决办法)