I'll venture to guess that you could immediately name five to 10, if not many more.

我冒昧地猜测，你可以立即数出大概5到10个，甚至更多数目。

youdao

If the planet continues to warm, some, if not many, plant species may not be able to adapt.

如果地球不断变暖，一些（不说很多）植物种类将会无法适应。

youdao

And yet, it seems to me that there are many activities, and if not many at least several activities, that people do precisely for that reason.

然而，在我看来是有许多活动，如果算不上许多也至少是一些活动，是人们出于那个原因而去做的。

youdao

The researchers say many, if not all,people likely have these antibodies but do not always produce or use them efficiently.

VOA: special.2009.03.04

And yet, it seems to me that there are many activities, and if not many at least several activities, that people do precisely for that reason.

然而，在我看来是有许多活动，如果算不上许多也至少是一些活动，是人们出于那个原因而去做的。

耶鲁公开课 - 死亡课程节选

It's not, it's certainly not as strong as in many other countries if you look at a lot of European countries.

这当然赶不上很多国家，如果你看看许多欧洲国家的话。

扶贫政策 - SpeakingMax英语口语达人

Yet manufacturing will still need people, if not so many in the factory itself.

ECONOMIST: Automation

If not, many of you colleagues or employees probably are.

FORBES: Are You Watching the Game?

If they had, many if not all of the smaller developing countries would probably have followed them.

BBC: Copenhagen climate accord: Key issues