Hjelmite
鈣鉭釔礦(原譯名鈣鈮鉭礦)
??? 情景例句
Who knows?
誰知道？
The electrician wears rubber shoes on the job.
電工在工作中穿著絕緣鞋。
The towers are built on immense underwater platforms make of steel and concrete.
塔身建在巨大的水下鋼盤混凝土平臺上。