51. chronic a. 慢性的；嚴重的
52. circulation n. 循環(huán); 發(fā)行（量）>Reader has the largest ~ in China.
53. climax n. 高潮 the ~ of the play
54. cling to v. 緊緊抓住， 依戀；堅持，墨守>The baby clung to his mother./ ~ to the hope that....
55. coincidence n. 巧合
56. collaboration n. 合作 in ~ with
57. collide v. 相撞; 沖突 The two opinions ~ with each other.
58. commence v. 開始
59. commute v. 乘車上下班 >I have to ~ between the university town and the downtown area.
60. compact a. 緊湊的, 結(jié)實的 a ~ car/office
52. circulation n. 循環(huán); 發(fā)行（量）>Reader has the largest ~ in China.
53. climax n. 高潮 the ~ of the play
54. cling to v. 緊緊抓住， 依戀；堅持，墨守>The baby clung to his mother./ ~ to the hope that....
55. coincidence n. 巧合
56. collaboration n. 合作 in ~ with
57. collide v. 相撞; 沖突 The two opinions ~ with each other.
58. commence v. 開始
59. commute v. 乘車上下班 >I have to ~ between the university town and the downtown area.
60. compact a. 緊湊的, 結(jié)實的 a ~ car/office