Thanks. I am just trying to understand why it is not right/wrong

来源: Euro-dollar 于 2018-11-12 07:00:08 [] [旧帖] [给我悄悄话] 阅读数 : (150 bytes)

I am not a physicist. But if Pa Jianwei is right, I should be able to understand why he is right, vice versa. 

Nice day.

请您先登陆，再发跟帖！