to take back an offer or statement, etc. or admit that a statement was false

retract an invitation/confession/promise 取消邀请／翻供／收回承诺

When questioned on TV, he retracted his allegations. 在接受电视采访时，他收回了他以前的说法。

to pull something back or in

The wheels retract after the aircraft takes off. 飞机起飞后轮子便收了起来。

The cat retracted its claws. 猫把爪子缩了回去。