質量 しつりょう保存 ほぞん法則 ほうそくだったら
shitsuryōhozonno hōsokudattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 質量保存の法則

1. If/When the law of conservation of mass…; If the law of conservation of mass were…

Tara Conditional