He would have played but for a knee injury.

他要不是膝部有伤的话，就上场了。

《牛津词典》

Students have played an important role in the past, but for the moment, they're on the margins.

学生们过去发挥了重要的作用，但现在，他们不再重要了。

《柯林斯英汉双解大词典》

I'm not afraid for me, but for the baby.

我担心的不是自己，而是婴儿。

《牛津词典》

But for people who have a difficult time controlling their movements, this little navigational issue can be a really big problem.

VOA: special.2011.04.18

But for Milton's contemporaries in the seventeenth century, Milton's power really wasn't at all aesthetic or even religious in nature.

但在17世纪弥尔顿同时代的人看来，弥尔顿的力量却是毫无美感的，甚至本质上不是宗教上的。

耶鲁公开课 - 弥尔顿课程节选

But for me, I like to look at something and just say, "I like this. I don't really know why though."

但对我来说，我喜欢看着某个东西，然后说，“我喜欢这个。但我也不知道为什么。”

关于现代美术 - SpeakingMax英语口语达人

But for that to happen, it means that Democrats and Republicans have to work together.

WHITEHOUSE: Weekly Address: A Bipartisan Approach to Strengthening the Economy | The White House

But for many years French nationals in Africa have been exposed at tumultuous times.

BBC: Is France under attack in Africa?

But for Gale the building would prove to be the first of many hiccups.

FORBES: Scratch Builders