Selwynite
铬铝石
🗣️ 情景例句
The reviews were all right; it was the best performance I have ever seen.
那些评论写得很对，是我所见过表现最好的一次表演。
No practice, no gain in one's wit.
吃一堑，长一智。
I doubt if he'll be asked to speak again next year.
我怀疑明年是否还会邀请他作报告。