常見例句Determined to find a better way to trade books, he teamed up with partner Robert Swarthout, who had developed a college textbook exchange. 網(wǎng)站上就有固定格式的郵寄包裝紙可以列印，寄書人衹需貼上郵票就可以寄出，換書程序非常簡(jiǎn)單方便。 返回 Swarthout