在意识到自己的错误后，他立即为撤回先前的声明而道歉。

After realizing his mistake, he immediately apologized for ___retracting his earlier 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.

在舆论压力下，政府不得不撤销了这项不受欢迎的政策。

Under public pressure, the government had to start ___retracting the unpopular policy.