Beyerite
[礦]碳鉍鈣石
??? 情景例句
How long have you known her?
你認識她多久了？
The lovers are watching the sailing boat.
情侶們在眺望著帆船。
Speculations about is nature have been going on for literally thousands of years,
人們對睡眠作用的種種猜測，確實有數千年之久。