英语的路标

discourse – n. the use of words to exchange thoughts and ideas

conversation – n. an informal talk between two people or a small group of people

informal – adj. relaxed in tone : not suited for serious or official speech and writing

o'clock – n. according to the clock

flexible – adj. able to change or to do different things

assure – v. to make something certain

introduce – v. to present something for discussion or consideration