level of protein的用法和樣例：
例句
- Exogenous nitrogen had a slight positive effect on protein level and these enzyme activities.
外源氮的加人對蛋白質(zhì)水平和酶的活性具有小的正面影響。 - Different protein levels had effects on the growth of red Carassius aurutus, but the difference was not significant.
不同蛋白質(zhì)水平對紅草金魚(yú)的生長(cháng)有影響，但差異不顯著(zhù)。
