大学英语：brighten ['braɪtn] v. (使)快活起来

bright

　　-en 常见的动词前缀、后缀。如：

　　enable, enrich, endanger, enlarge 等。(请结合 Unit 1，Text B)

　　broaden, widen, lengthen, strengthen, shorten, deepen, weaken

　　联想：

　　long-length-lengthen

　　deep-depth-deepen

　　strong-strength-strengthen

　　wide-width-widen

　　broad-breadth-broaden

　　high-height-heighten

　　weak-weakness-weaken

　　short-shortness-shorten

　　27. frown [fraʊn] v. 皱眉;蹙额

　　28. scowl [skaʊl] v. 怒视(某人或某事)

　　Phrases and Expressions

　　1. make a hit 给(某人)留下很好的第一印象;使(某人)一见钟情

　　2. jump out of one's skin 欢喜雀跃;兴高采烈

　　3. as luck would have it 碰巧;偶然;幸而

　　4. be characteristic of 典型的;独特的;特有的

　　5. strike up (和某人)建立友谊，开始来往，交谈起来