“這樣一來 酸度會被壓下來 而且不用擔心冰塊融化時味道會變淡”
我想這樣寫 ：“In that case, the sour would be restrain and you don't have to
worr
y that the flavor would be lightened when the ice melted.
不太確定可不可以用the flavor當主詞 希望大家幫我看這句有沒有問題

In that case, we can reduce the sourness without worrying that melting ice would dilute the taste.