Pyrrhotite
n. [礦]磁黃鐵礦
??? 情景例句
There aren't too many examples of this style of architecture left these days.
現(xiàn)在這種風(fēng)格的建筑已所剩無(wú)幾了。
Have you milked the cows?
你已經(jīng)擠過(guò)奶了嗎？
Are you a teacher?
你是教師嗎？