Richetite
铅铀矿
🗣️ 情景例句
I know,
我知道，
Besides the required courses, I'm taking an elective in the Lab Science.
除必修科目外，选修科目我选了实验科学。
On the way home, my wife said to me, 'Don't drive so quickly! You're not Billy Stewart!'
“别开得这样快！你可不是比利。斯图尔特！”