这张邮票的 价目 是五美元.This stamp catalog ( ue ) s at five dollars.你是想了解某一种珍稀邮票还是想了解珍稀邮票的整体概念？Do you want to know about a particular rare stamp or rare stamps in general?这张旧邮票的背面没黏性了, 我得用胶把它粘在信封上.This old stamp isn't sticky ...