harmful ingredient的用法和样例：
例句
- If you have purchased this kind of food, must stop immediately edible, and drinks water, dilutes the harmful ingredient.
如果你购买了这类食品，要立即停止食用，并且多喝水，稀释掉有害成分。 - Some contain active ingredients, but others contain no active ingredient or even harmful ingredients such as boric acid.
有些内含有效成分，其他则否，或甚至含有如硼酸之类的有害成分。
