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

Tanaka This is Tanaka who you just saw was the only one I found at the place when we were looking for someone for an interview. And she gave us this fascinating story of what is the life for a mother worrying about her daughter in this time of changes.

刚才你们看见的是,是我在采访时发现的唯一的人,她给我们讲述了一个,非常感人的故事,是关于母亲如何担心她女儿的。

麻省理工公开课 - 媒体、教育、市场课程节选