She called on Eritrea to clarify the whereabouts of 11 MPs who disappeared without a trace in September,2001.

VOA: standard.2009.04.09

And as you'll see by your handout, I've attempted tend to trace it.

你们可以看看课堂材料，我尝试着去找，了找它的起源，我能找到。

麻省理工公开课 - 计算机科学及编程导论课程节选

There's an orgasmic element in what Derrida has in mind, so that when he speaks of "the seminal adventure of the trace," toward the end of your essay, you want to put some pressure on that word "seminal."

在德里达的思想中有一种兴奋的元素，所以当他在文章结尾处“,说到，“有创意的追溯之旅“时，大家想要将重点放在，“有创意的“上“

耶鲁公开课 - 文学理论导论课程节选

Over the past few decades,however, scientists have determined that even trace amounts of lead in children's bodies leads to long-term neurological and behavioral problems.

VOA: standard.2009.12.19

You don't have to worry, we're definitely talking about trace, trace amounts.

但你不必担心，我们所说的绝对是非常，非常微量的。

麻省理工公开课 - 化学原理课程节选

At the same hearing, he says in one of the best studies used molecular fingerprinting to follow an outbreak of drug-resistant bacteria: "You actually can trace the specific bacteria around and they find that the resistant strains in humans match the resistant strains in the animals."

VOA: standard.2010.07.21

We are also put in mind of how the war is, in fact, anything but a revel, though it, too, may have been provoked by a cause as insignificant and hard to trace as "some wizard vermin."

我们同样也思考事实上战争，只是一场狂欢，尽管它有可能,是由一个毫不重要难以追踪的“一些害虫“引起的“

耶鲁公开课 - 现代诗歌课程节选

But then you can trace it to some external forces, which are carrying your iPod.

过一会儿你就能发现一些外力的作用,也就是有人把你的 iPod 拿走了

耶鲁公开课 - 基础物理课程节选