在我前面的一个告示牌上写着“系上安全带，这是伊利诺伊州的法律”。

A sign just ahead of me said, "Buckle Up. It's the Law in Illinois."

《柯林斯英汉双解大词典》

我看见在我前面30码处有一个穿蓝色夹克的男人。

I saw a man in a blue jacket thirty yards ahead of me.

《柯林斯英汉双解大词典》

他在我前面的班上,在伊曼音乐学院

He was a couple of classes ahead of me at the Eastman School of Music.

youdao

But just to be really clear, I've written out exactly which equations you do have to memorize on the front here, so long as you know those, the rest you can just look up.

但是让大家清楚，我已经,把大家需要记住的公式都写在前面了，只要你知道了这些，其它的就只需要查了。

麻省理工公开课 - 化学原理课程节选

It's a common mistake to make if you forget that I've actually declared that variable up top, but wait a minute, I know any time that I use a variable, I have to declare it.

这是一个通常犯的错误，如果你忘了,之前在前面已经声明了这个变量，等等，我知道在任何时候,我使用一个变量，我必须声明它。

哈佛公开课 - 计算机科学课程节选

And, just to show some of the hidden balance here, 1 here we have one mole. I don't put a one in front.

这儿有一些隐藏的平衡，比如说这个1摩尔，我并没有在前面写了一个。

麻省理工公开课 - 固态化学导论课程节选