1. Some drugs kill off useful bacteria in the user's body. 某些药物会杀死服用者体内的有益细菌。
2. The prophets of doom who said television would kill off the book were wrong. 认为电视会扼杀书籍的悲观预言家完全错了。
3. In Brazil, cattle ranchers used to nearly kill off jaguars because they would kill their cows. 在巴西，牧场主人以前几乎把美洲虎都杀光了，因为它们会杀害他们的牛群。
4. Readers joined some authors in a plea to J.K. Rowling not to kill off Harry Potter in the seventh and final book. 读者和一些作家请求 J.K.罗琳不要在第七部，也是最后一部书中杀死哈利·波特。
5. The more diligent we are, the more likely we are to accumulate experience, master skills, discover and kill off our shortcomings and create more opportunities. 我们越勤奋，就越有可能积累经验，掌握技能，发现并消除我们的缺点并创造更多机会。
