My ex-husband passed away more than 20 years ago, I have been single.

我的前夫在20多年前去世了，我一直单身。

youdao

If I were single, I probably would have been able to use that as a dating thing.

如果我还单身，我就可以在约会时使用它了。

youdao

See, up until now I have been talking about gas phase, single atoms, all this stuff.

看，只到现在我们已经讨论了气相，单原子，这些东西。

youdao

But I have never been able to remember a single feature."

VOA: special.2009.12.24

See, up until now I have been talking about gas phase, single atoms, all this stuff.

看，只到现在我们已经讨论了气相，单原子，这些东西。

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