英译汉：Theemergenceofthebot-aggregatorexchangeasaprimarysaleschannel,whichemploysrulestoenabletransactions.

Iwasgreatlyshockedbytheway__________thingsweredonethere.

必要的;基本的adj.要素，要点n.e_______________

翻译：saletax

英译汉：Developmentofexchangesthataggregatetheinformationharvestedbybotsinordertoreducetransactioncostsandeliminateconcernsoffraud;and