Polycrase
(=polycrasite)[礦]復(fù)稀金礦, 鍺鈾釔礦石
??? 情景例句
Stopping by Woods on a Snowy Evening.
雪夜林邊小駐足。
Excuse me I couldn't write you sooner.
對不起我不能盡快給你寫信。
Tomorrow evening they will be singing at the Workers' Club.
明晚他們將在工人俱樂部演出。