The researchers say larger class sizes are another possible reason for the increase in injuries.

VOA: special.2009.08.06

And this is just a picture showing some of these sizes with their parent. So, for example, a lithium here, you can see how lithium plus is smaller than the actual lithium atom in its neutral state.

这是一张对比图,展示某些离子与它们的母体，比如，这里是锂，大家可以看到正一价锂离子是多么的小,与中性锂原子相比。

麻省理工公开课 - 化学原理课程节选

Now as for all these data sizes, let's close one outstanding question.

现在为了这些数据量，让我们先结束一个未解决的问题。

哈佛公开课 - 计算机科学课程节选