Mangnotantalite
锰钽铁矿
🗣️ 情景例句
Has poor scholastic record, just got by.
学习成功不够好，仅仅过得去而已。
No safe wading in an unknown water.
未知水深浅，涉水有危险。
Learn to say the right thing at the right time.
学会在适当的时候说适当的话。