Obligative
专性的
🗣️ 情景例句
That was not the case.
事实并非如此。
Prevention is better than cure.
预防胜于治疗。
If you were to ask Harry what was in the bottle, he would tell you that it contained perfumed mud.
要是你问哈里瓶里装着什么，他会告诉你是香水泥。