she had hair like the midnight sky and she smiled up them with shining gray eyes As the old man lifted the little girl in his arms, Mother Moonshower put the rain babies into the silver basket.

VOA: special.2009.02.28

But that's a little bit hard, we aren't all that good at seeing electrons with our eyes, so we need to think of a way to do this.

但那有一点困难，我们都不能通过眼睛看到电子，我们需要想一种方法去做到它。

麻省理工公开课 - 化学原理课程节选

But that's a little bit hard, we aren't all that good at seeing electrons with our eyes, so we need to think of a way to do this.

但那有一点困难，我们都不能通过眼睛看到电子，我们需要想一种方法去做到它。

麻省理工公开课 - 化学原理课程节选