重点讲解:
1. be based on 以…为基础;
例句:That opera is based on an actual occurrence.
那部歌剧是根据真实的故事编写的 。
2. at least (数量)至少,不少于;
例句:At least 500 people attended the conference.
至少500人参加了这个会议 。
3. be sensitive to 过敏的;易受影响的;敏感的;
例句:His pallid skin was sensitive to the glaring sun.
他苍白的皮肤对耀眼的阳光很敏感 。
4. wipe out 摧毁;毁灭;使灭绝;
例句:The disease threatens to wipe out the entire population.
这种疾病有可能毁灭整个种群 。
adv. 绝对地,完全地;独立地