Protactinides
镤化物
🗣️ 情景例句
Oh, yes, George.
还行，乔治。
That's true.
那是真的。
In the evenings he studied hard for his exams, and most mornings he took tourists around Oxford.
他晚间努力学习，以应付考试，而大多数早上，他则带领游客在牛津大学参观。