Quaternaries
[化] 季盐; 季铵盐类
🗣️ 情景例句
Speaking of mother and of father
谈到孩子的爸， 孩子的妈，
Out of debt, out of danger.
无债一身轻。
The Scandinavian countries are much admired all over the world for their enlightened social policies.
斯堪的纳维亚半岛各国实行开明的社会政策，受到全世界的推崇。