One wants to meet like-mindedcollectors, to get advice, to compare notes, to exchange articles, to show off thelatest find. So one's circle of friends grows. Soon the hobby leads to travel, perhaps toa meeting in another town, possibly a trip abroad in search of a rare specimen, forcollectors are not confined to any one country.

　　19.One wants to meet like-minded collectors, to get advice, to compare notes, toexchange articles, to show off the latest find.

　　收藏者要会见情趣相投的收藏者，以获取教益，交流经验、交换收藏品，炫耀自己的最新收藏。

　　语言点:句子结构分析: to get advice, to compare notes, to exchange articles, to show off thelatest find构成了平行结构。

　　20.So one's circle of friends grows.

　　朋友的圈子就这样不断扩大。

　　21.Soon the hobby leads to travel, perhaps to a meeting in another town, possibly atrip abroad in search of a rare specimen, for collectors are not confined to any onecountry.

　　用不了多久，有这种爱好的人便开始旅行，也许是去另一个城市参加会议，也可能是出国寻找一件珍品，因为收藏家是不分国籍的。