Naoko Kurahashi Neilson is a physicist at Drexel University in Philadelphia.

尼尔森直子是费城德雷塞尔大学的物理学家。

Neilson said neutrinos are elementary particles, meaning they are not made up of anything smaller.

尼尔森说，中微子是基本粒子，这意味着它们不是由更小的东西组成的。

Neilson Media Research says across four major American media networks, there was a 36 percent decrease in viewership from the record set in 2016.

Neilson的媒体调查显示，美国四大媒体网络的收视率，与2016年创下的纪录相比，下降了36%。