In one study,infected mothers began to take three anti-H.I.V.drugs while breastfeeding for up to six months.

VOA: special.2009.07.29

I've been taking the train for the past, say, give and(or) take six years and I've always loved it.

我以前一直坐火车，大约6年里都乘坐它，我一直很喜欢它。

方便的欧洲之星 - SpeakingMax英语口语达人

On the next step though, this, we get substituted by that. Right, on the next step, I'm back in the even case, it's going to take six more steps, plus t of b minus 1. Oops, sorry about that, over 2.

这一步就是偶数了，这一步会让我们得到，6+t这样的结果，因为b-1现在是偶数了,别忽略这里的细节。

麻省理工公开课 - 计算机科学及编程导论课程节选