1. The task will be finished ahead of schedule if nothing prevents.
   "如果没有什么阻碍的话,这项任务将提前完成。"
2. The importance of washing one's hands before a meal is that it prevents infection.
   饭前洗手的重要性在于防止传染。
3. I have been unavoidably prevented from coming.
   我身不由己, 不能前往。
4. Rheumatism prevents him form bending his back.
   风湿病使他不能弯腰。
5. A fireguard prevents children getting near the fire.
   炉挡防止孩子们靠近炉火。
6. It is the job of the police to prevent crime.
   防止犯罪是警察的职责。
7. Rebellious students stubbornly demanded that the CIA be prevented from recruiting on campus.
   反抗的学生们坚决要求不准中央情报局在学校里招募人员。
8. Nickel underplating prevents the migration between tin or gold platings and the base material.
   垫板镀镍可防止在镀锡或金层与基料之间的移动。
9. Vitamin C is supposed to prevent colds.
   维生素C可以预防感冒。
10. Prevent stern red anthema and cross infection.
    可避免交叉感染。
11. Only her quick reaction prevented an accident.
    她的快捷反应避免了一次事故。
12. It is hard to prevent concrete from creeping.
    很难防止水泥变形。
13. The diluent could prevent trimebutine maleate from precipitation.
    能较好地阻止马来酸曲美布丁的结晶析出。
14. What prevented you from joining us last night?
    昨天晚上什么事使你不能参加我们的晚会?
15. We were prevented by heavy smog from seeing anything.
    浓雾使我们看不到任何东西。
16. Always keep food covered to prevent contamination by flies.
    时常把食物盖着以防苍蝇污染。
17. The wood is treated with preservative to prevent decay.
    这块木头用防腐剂处理过以防止腐烂。
18. Many interruptions have prevented me from finishing the work.
    许多打岔的事使得我未能完成这项工作。
19. The police tried to prevent infiltration by drug traffickers.
    警方尽力阻止毒品走私分子的潜入。
20. Numerous interruptions have prevented me from finishing the work.
    数不清的干扰使我未能完成这项工作。

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