This one, I'm lost for words with.

这个，我不知道该说什么好。

Well, I hope you won't be lost for words, the next time you want to apologise in English!

哈，希望下次你用英语（需要向谁）道歉时会知道说什么。

Well, I hope you won't be lost for words, the next time you want to apologise in English!

哈，希望下次你用英语（需要向谁）道歉时会知道说什么。

For once in her life, she was lost for words.

【lost】她平生就这一回不知道该说什么好。

I knew I should say something but I was lost for words, and there was an enormous lump in my throat.

我知道我应该说点什么， 但我说不出话来，喉咙里有一个巨大的肿块。

As you follow each and every twist and turn down Highway One, you too will be lost for words, for this is a place that often defies the limits of language.

随着您顺沿每一个弯道，驶入加州1号海岸公路，也会受到震慑，因为这片风景的美丽浩瀚超越言语。