Oligonite
[化] 菱锰铁矿
🗣️ 情景例句
Many business people turn off their pagers and cell phones during their leisure time.
许多商人在他们的休息时间里都把传呼机和移动电话关掉。
He that boasts of his own knowledge proclaims ignorance.
夸耀知识实乃无知。
She likes the children to read newspapers and books in the reading room.
她喜欢孩子们来阅览室读书看报。