"I was one of these teenagers, and so I know how difficult it can be to break this habit when it's been with you for a long time,".

VOA: standard.2009.06.22

I held off for a very long time, but I just got mine a month ago. And now I don't know how I live without it.

我拖了好长时间，一个月前才买的。而且现在我不知道离开它该如何生活。

没有智能手机活不了 - SpeakingMax英语口语达人

I'm going to live here for, who knows how long. Quite a long time.

我打算定居在这儿，不知道多久。会是相当长一段时间。

追忆艾米 - SpeakingMax英语口语达人