Ferrojacobsite
铁锰尖晶石
🗣️ 情景例句
I ventured to correct the teacher's mistake.
我鼓起勇气去纠正老师的错误。
I get to my office at 10:30.
十点半到办公室。
I ought to go home. I have to cook supper for my grandmother.
我该回家了。我得给奶奶做晚饭。