The group says less time passes for an earthquake shock wave to reach a measuring instrument than in the past.

VOA: special.2009.03.17

That's the interactive program we have both in shock wave and in job of 3D, which allows students to build molecules.

那便是互动项目,我们同时有冲击波,和3D效果，使学生能够,构建分子。

麻省理工公开课 - 媒体、教育、市场课程节选