他以不到一秒钟的差距输了比赛。

He lost by less than one second.

《牛津词典》

整个过程耗时不到一秒钟。

That whole process takes less than a second.

youdao

平均而言，一条标题耗费网站单个访问者不到一秒钟的时间。

On average, a headline has less than a second of a site visitor's attention.

youdao

Now, this is underwhelming with what you can do in just a second in this particular language.

该语言在一秒钟内就可以做出,一些意想不到的事情。

哈佛公开课 - 计算机科学课程节选