Podolite
碳磷灰石
??? 情景例句
I propose issuing a time draft for US $ 100,000.
我建議開具價值10萬美元的遠期匯票。
Skiing is such a difficult sport that it's more work than play.
滑雪是非常困難的運動，真所謂工作高于游戲呀。
For hundreds of years, St.Bernard dogs have saved the lives of travellers crossing the dangerous Pass.
幾百年來，圣伯納德修道院馴養狗拯救了許多翻越這道山口的旅游者的生命。