And there he was able to identify the alpha particle as the helium nucleus.

他证实了,阿尔法粒子就是氦核。

麻省理工公开课 - 固态化学导论课程节选

This is the analogy to the alpha particle.

这和阿尔法粒子类似。

麻省理工公开课 - 固态化学导论课程节选

So basically he's trying to put some atoms in the way of the alpha particle.

把一些原子,放在alpha粒子的路径上。

麻省理工公开课 - 化学原理课程节选