Davisonite
[矿]板磷钙铝石
🗣️ 情景例句
When he came to the States five years ago, he had only forty dollars in his pocket.
五年前他来美国时，口袋里只有40美元。
Who rang the bell a while ago?
刚才谁在按门铃？
What kind of school will it be?
要办什么样的学校？