她发现自己说错了， 连忙改口。

She corrected herself as soon as she found she had made a mistake.

《新英汉大辞典》

蝙蝠改口说自己不是鼠，而是鸟。

The Bat assured him that he was not a mouse, but a bird.

youdao

'那是在四月份-不，在五月份'，他改口说。

It was in April — no, May, 'he said, correcting himself.

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但是昨天，他却说改口说他是红孩儿，不是孙悟空了。

However, yesterday, he said he was the Red Boy, not the Monkey King.

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但是昨天，他却说改口说他是红孩儿，不是孙悟空了。

However, yesterday, he said he was the Red Boy, not the Monkey King.

youdao