retract|retracted|retracts

乌龟可以缩回它的头来保护自己。

A turtle can ___retract its head to protect itself.

他在社交媒体上发帖道歉并撤回之前的言论。

He posted an apology on social media and ___retracted his previous statement.

乌龟遇到危险时会迅速将头缩回壳里。

The turtle quickly ___retracts its head into the shell when sensing danger.