Pyroaurite
碳酸镁铁矿, 鳞镁铁矿
🗣️ 情景例句
Going away to college for the first time
第一次离家上大学，
Please try to be congenial and welcome the guests with a small.
请用笑脸愉快地迎接客人吧。
Six men have been trapped in a mine for seventeen hours.
6个人被困在矿井里已有17个小时了。