By lubricating airways, our third class of ingredients, expectorants, aim to help improve coughing rather than eliminate it.

通过润滑呼吸道，我们的第三类成分祛痰剂，旨在帮助缓解而非消。

If you add some lemon and honey to your water and warm it, this can also help to loosen phlegm and reduce congestion.

如果你在水中入一些柠檬和蜂蜜并热，有助于祛痰和减少充血。

Guaifenesin, the most common expectorant, is thought to hydrate mucus by upping fluid secretions in the respiratory tract, making it less sticky and easier to clear out.

愈创甘油醚是最常见的祛痰剂，它被认为是通过增呼吸道中的液体分泌物来滋润粘液，使其不那么粘稠，更容易清。