And this would sit on your belt. So it would sit like this and there would be batteries that you could either put in a fanny pack or there are all kinds of jackets you could wear in order to support the batteries,"

VOA: standard.2010.01.27

All right, now you can pack up

好了，你们可以

麻省理工公开课 - 化学原理课程节选

All right, now you can pack up

好了，你们可以

麻省理工公开课 - 化学原理课程节选