My father has been the President of the company since he was in his thirties.

我父亲三十几岁就是公司的董事长了。

The poor life of the people in the thirties is beyond imagination.

三十年代，人们的贫苦生活简直难以想象。

He founded this technology company in his thirties.

他在三十几岁创立了这家科技公司。

She's in her mid-thirties—thirty-six to be exact.

她三十五岁左右—确切地说是三十六岁。

It's sometimes hard to imagine how bad things were in the thirties.

有的时候很难想像三十年代的情况有多糟。

Mozart clearly enjoyed good health throughout his twenties and early thirties.

莫扎特显然在二十几岁和三十刚出头时身体很好。

Yes, it was in my thirties.

是的，那是我三十多岁的时候。

Dickens started writing novels in his early thirties and became successful almost immediately.

狄更斯三十出头就开始写小说，并几乎立刻获得了成功。