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dramatic adj. 戏剧性的
It marked the dramatic end of a lengthy and contentious investigation but also rang in a new round of partisan fighting.
这标志着漫长而有争议的调查的戏剧性结束，但也引发了新一轮的党派斗争。
infectious adj.传染的；
Then, last week, Long Beach officials announced that a traveler diagnosed with measles passed through Long Beach Airport twice while infectious.
上周，长滩官员宣布，一名被诊断出患有麻疹的旅行者在感染期间两次通过长滩机场。
leapfrog n.跳背游戏（分开两腿从背弯站立者身上跳过）；（两支部队）交互跃进；v.跳背，交替前进，跃过；
The win allowed them to leapfrog three teams to gain second place.
这场胜利使他们连超三个队，跃居第二位。
