But one thing I'll remember.

但有一件事我会记得。

But one very famous symbol in American culture is a cartoon.

但美国文化中一个非常著名的象征是卡通。

This might sound funny, but one only has to think about the Earth.

这听起来可能很滑稽，但只需想想地球。

But one in three households doesn't have Internet.

但三分之一的家庭没有互联网。

But one thing is certain: after the first word, others come quickly.

但有一件事是肯定的：在第一个词之后，其他词很快就会出现。

But one specific complaint is made especially mournfully: There's never any time to read.

但是其中一个特别悲哀的抱怨是：没有时间阅读。

But one day I chanced to show up for an after-school meeting of the Science Olympiad team.

但有一天，我碰巧参加了科学奥林匹克竞赛队的课后会议。

One affirms, but one doubts.

我们一面肯定, 但我们一面也怀疑.

But one by one the Spartans fell.

可是斯巴达人一个一个地倒下了。

Born free, sadly, but one kiss one heart.

出生的自由，可悲的是，一个吻一颗心却是不自由的。