演讲: lecture, to make a speech...
账户: bank account, online account...
通用: to use anywhere, anytime (card, ticket etc), to be used by everyone (language, textbook etc), (of two or more things) interchangeable...
办公: to handle official business, to work (esp. in an office)...
底蕴: inside information, concrete details...
元老: senior figure, elder, doyen...
商场: shopping mall, shopping center, department store, emporium, the business world...
东西: thing, stuff, person...
迷失: to lose (one's bearings), to get lost...
出卖: to offer for sale, to sell, to sell out or betray...
