1. Ideas flew back and forth and before the end of the meeting the original idea had been expanded to include collection of all sorts of books- not only textbooks-and distribute them, let vendors sell new books from rented stalls, have food stalls and finally allow some games stalls.
...主意漫天飞, 在会议结束之前最初的构想已经被设想了,构思包括收集那些类别的书——不光是教科书——以及分售它们.让分销商租赁摊位销售新书,可以是食物摊以及可能最终允许游戏摊位销售.
2. 是指会议成功要感谢.,最后感谢好天气（就是天气帮忙）
3.As could be expected the merchants were the first to arrive.
正像所预期的那样.As 表示正如 词性adv 副词句首倒装
4.Then the stuffy organisers got a few queues organised and everythings was dull and orderly
然后乏味古板的组织者组织了几个队列,每件事都乏味和过时.
get sth done 某样东西被. 如：get my hair cut（过去分词） 把头发剪了,动作发出者不一定是你自己.
5.very moment 在这里是此时此刻的意思么?表示强调语气,就在这个时候或是就在这个非常时候.