Separatrix
n. [自] 分界线；分隔号
🗣️ 情景例句
You'll be glad to hear that Bill is alive and kicking.
比尔现在精神饱满，你听了一定很高兴。
We never imagined that John would become a doctor.
我们从来没想象约翰将成为一位医生。
When did they live there?
他们什么时候住在那儿？