Cryptogenic
a. 起因不明的
🗣️ 情景例句
What events are happening on campus?
校园里有什么事件发生？
Everyone is entitled to his own opinion.
每个人可以保留他的自己的意见。
He's picking the apples on that tree. He's putting them in a basket.
他在摘那棵树上的苹果。他正在把苹果放进一只篮子里。