Abrasives
n. （研）磨料, 磨蝕劑( abrasive的復數形式 ); <地質>磨蝕巖屑
??? 情景例句
He's on leave now.
他現在在休假。
How about Mary? How long has she lived there?
瑪麗怎么樣？她在那兒住多久了？
After I had sat down, he said that business was very bad.
待我坐下后，他說生意非常不景氣。