Periclasite
方镁石
🗣️ 情景例句
I majored in economic and trade English.
我主修的是经贸英语。
I hope I didn't offend you.
希望没有冒犯你。
Haroun Tazieff, the Polish scientist,
波兰科学家哈罗恩。塔捷耶夫，