Pyrochroite
羟锰矿
🗣️ 情景例句
Do you want manual or automatic transmission?
你的汽车想配备一个手动挡还是自动挡？
There is no smoke without fire.
无风不起浪。
Visitors have been asked to keep the woods clean and tidy.
游客已被告知要保持树林的整洁。