它只在血液流动较缓的静脉中起作用。

It works only in the veins, where the blood flow is slower.

《柯林斯英汉双解大词典》

另一方面，它只可能让你负债。

On the other hand, it could just put you in debt.

youdao

它只稍微轻了一点。

It weighed just a bit less.

youdao

We can never just have it there before us or, as I say, if we can--if we can--it's a very, very difficult act of concentration.

我们永远不能只面对着它，或者，要我来说，如果我们可以的话，那将需要高度集中注意力，这是很难的。

耶鲁公开课 - 文学理论导论课程节选

There are some exceptions, which we'll get to later, but the only a big exception here is with hydrogen, which has a special stability that's associated with two electrons.

但也有一些例外我们将以后再讲，但这里只有一个较大的例外，氢，它的稳定性比较特殊，只需要两个电子。

麻省理工公开课 - 化学原理课程节选

This is a baby elephant, so it's really, really big-- except it's a baby elephant, so it's really, really small."

这是只大象宝宝,所以它很大很大,但是它只是个大象宝宝,所以它其实又很小很小

耶鲁公开课 - 死亡课程节选