而当酸和盐用量达到一定值后，此效果被酸和盐明显的促染作用所取代。

However, the effect is lost when the acid and salt reach a certain amount.

youdao

而当酸和盐用量达到一定值后，此效果被酸和盐明显的促染作用所取代。

However, the effect is lost when the acid and salt reach a certain amount.

youdao