On Tuesday, in a noisy lobby of a congressional office building, reporters bombarded financial services chairman Barney Frank,a Massachutsetts Democrat, with questions about the AIG bonuses.

VOA: standard.2009.03.17

Basically what he did is he took a very thin metal foil and he bombarded it with charged particles.

简单的说他做的工作是,用一张非常薄的金属箔,然后用带电的粒子轰击它。

麻省理工公开课 - 固态化学导论课程节选

Basically what he did is he took a very thin metal foil and he bombarded it with charged particles.

简单的说他做的工作是,用一张非常薄的金属箔,然后用带电的粒子轰击它。

麻省理工公开课 - 固态化学导论课程节选