Picrotephroite
镁锰橄榄石
🗣️ 情景例句
Where shall I put my signature?
我签在哪儿呀？
A work ill done must be twice done.
未做好的活，需要重新做。
I want to improve, but I don't know how.
我想提高它，但又不知道怎么样才能提高。