我本没打算告诉任何人你要结婚了——这话只是无意中说出来了。

I didn't mean to tell anyone you were getting married - it just ___slipped ___out.

我无法理解这些话是怎么从我嘴里说出来的。

I could not understand how these words had ___slipped ___out of my mouth.

他本不想冒犯她，但那句尖刻的评论无意中说了出来。

He didn't mean to offend her, but the harsh comment ___slipped ___out.