Phosphocerite
磷镧铈矿
🗣️ 情景例句
How long does it take you to get through a letter?
你写一封信要花多少时间？
Knowledge advances by steps and not by leaps.
知识只能循序渐进，不能跃进。
Then they arrived just when we wanted them.
这样，他们可以恰好在我们要求的时间到达。