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.

乌龟把头缩回了壳里。

The turtle ___retracted its head into its shell.

他在意识到错误后立即撤回了之前的指控。

He immediately ___retracted the previous accusation after realizing his mistake.