Polytelite
银铅, 黝铜矿
🗣️ 情景例句
In those days, when they made quilts.
那个时代 ，人们做被罩时，
She was flattered at the invitation.
她受到邀请，不胜荣幸。
The further off this solid obstruction, the longer time will elapse for the return of the echo.
固体障碍物越远。回声返回所用时间就越长。