例句與造句

1. N is the nuclear magneton, " e " is the elementary charge and " m " p is the proton rest mass.
2. :Your third reaction ( decay ) isn't prevented by conservation of energy, because the total rest mass of a pion and two electrons is smaller than the proton rest mass.
3. It's difficult to find proton rest mass in a sentence. 用proton rest mass造句挺難的