【正文】 t prepared a speech so I suddenly had to improvise. To sleep on, we improvised a mattress from a pile of blankets. 2 When actors or musicians improvise, they perform without fixed speech or music, making it up as they perform it: During certain scenes of the play there isn39。 they are deluding (迷惑 ) themselves. What they actually mean is I enjoy it more when there39。 Module 4 Music Born in AmericaSection 3 Words and Expressions素材 Section 3 Words and Expressions from Module 4 Music Born in America vain adj. 自負(fù)的； 愛虛榮的 unsuccessful or useless。s music going. That may be true, but studies indicate that it takes students longer, and the results are worse, if there are distractions like music and television when they are working on their homework. If you must listen to music while studying or doing homework, at least listen to classical music。t have the technique of a truly great performer. improvise v. 1 to invent or make sth., such as a speech or a device, at the time when it is needed without already having planned it: I hadn39。t any script and the actors just improvise (the dialogue). emerge v. 1 to appear by ing out of sth. or out from behind sth.: She emerged from the sea, blue with cold. 2 to e to the end of a difficult period or experience: The Prince emerged unscathed from the scandal. arise v. to happen: (arose, arisen) Should the opportunity arise, I’d love to go to China. Could you work on Saturday, should the need arise (= if it were to be necessary)? Are there any matters arising from (= caused by) the last meeting? boom n. a period of sudden economic growth, especially one that results in a lot of money being made: This year has seen a boom in book sales. The insurance business suffered from a vicious cycle of boom and bust. the property boom v. The leisure industry is booming (= is very successful). pace n. 1 the speed at which someone or sth. moves, or with which sth. happens or changes: a slow/fast pace When she thought she heard someone following her, she quickened her pace. Could you slow down a bit I can’t