Anticaries
a. 防齲的
??? 情景例句
Really. I didn't like math.
真的。我不喜歡數(shù)學(xué)。
He who rides a tiger is afraid to dismount.
騎虎者難下。
At the moment, he's in Madrid.He flew to Spain a week ago.
現(xiàn)在他在馬德里。他是一星期以前飛到西班牙的。