Pyrophosphorite
白磷钙矿
🗣️ 情景例句
It works!
有效！
I used to set my alarm clock for exactly 7 a.m.
我过去常将闹钟调为上午7点整。
In 1860, a better plan was put forward by an Englishman, William Low.
1860年，一位名叫威廉。洛的英国人提出了一项更好的计划。