VERB
叛逃;背叛;变节;倒戈
If you defect, you leave your country, political party, or other group, and join an opposing country, party, or group.
例句
He tried to defect to the West last year...
去年他试图叛逃到西方。
He defected from the party in the late 1970s.
他在20世纪70年代后期叛出了该党。