prevent

verb

1. 阻止；阻碍；阻挠
   to stop sb from doing sth; to stop sth from happening
   1. The accident could have been prevented.
      这次事故本来是可以防止的。
   2. He is prevented by law from holding a licence.
      法律不准他持有执照。
   3. Nothing would prevent him from speaking out against injustice.
      什么都不能阻止他鸣不平。
   4. Nothing would prevent him/his speaking out against injustice.
      什么也阻挡不了他为不平之事鸣冤叫屈。

1. VERB 防止；预防；阻止
   To prevent something means to ensure that it does not happen.
   1. These methods prevent pregnancy...
      这些方法能防止怀孕。
   2. Further treatment will prevent cancer from developing...
      进一步的治疗将阻止癌症恶化。
   3. We recognized the possibility and took steps to prevent it happening.
      我们认识到了这种可能性，并且采取了一些预防措施。
2. VERB 阻止；制止；阻碍
   To prevent someone from doing something means to make it impossible for them to do it.
   1. He said this would prevent companies from creating new jobs...
      他说这将使公司无法创造新的工作机会。
   2. Its nationals may be prevented from leaving the country...
      其国民可能会被禁止出境。
   3. The police have been trying to prevent them carrying weapons.
      警方一直都设法阻止他们携带武器。

1. Your community officer can give you advice on how to prevent crime in your area
   社区工作人员能就如何预防社区内犯罪提供一些忠告。
2. This may help to maintain the gains you've made and to prevent backsliding.
   这或许有助于保持你所取得的进展，防止倒退。
3. The packaging must provide an effective barrier to prevent contamination of the product.
   包装必须提供有效的保护，以免产品受污染。
4. The strawberries are kept in cold storage to prevent them spoiling during transportation.
   草莓在运输过程中要冷藏，以防止变质。
5. Lemon juice can help to prevent economy-class syndrome by improving blood circulation.
   柠檬汁能够改善血液循环，有助于预防经济舱综合征。
6. As their roots are strong and penetrating, they prevent erosion.
   它们的根十分粗壮而且扎得很深，从而避免了受侵蚀。
7. Family control would prevent any hostile takeover or greenmail attempt.
   家族管理可以防止任何恶意收购或绿票讹诈的企图。
8. Early identification of a disease can prevent death and illness
   病症的及早诊断可避免死亡与病痛。
9. I pray that death may not intervene to prevent our meeting with my darling children.
   我祈祷死亡不要阻挠我们与我亲爱的孩子们见一面。
10. The UN needs to become more interventionist to prevent human rights abuses and suffering.
    联合国应该更多地进行干涉以阻止对人权的践踏和苦难的发生。
11. Smear Vaseline on to your baby's skin to prevent soreness.
    给孩子皮肤上抹些凡士林以防止肿痛。
12. Although the causes of cancer are being uncovered, we do not yet have any practical way to prevent it
    虽然癌症的病因正被逐步揭开，但我们尚未有任何切实可行的办法来预防它。
13. These methods prevent pregnancy
    这些方法能防止怀孕。
14. Further treatment will prevent cancer from developing
    进一步的治疗将阻止癌症恶化。
15. We recognized the possibility and took steps to prevent it happening.
    我们认识到了这种可能性，并且采取了一些预防措施。
16. He said this would prevent companies from creating new jobs
    他说这将使公司无法创造新的工作机会。
17. Its nationals may be prevented from leaving the country
    其国民可能会被禁止出境。
18. The police have been trying to prevent them carrying weapons.
    警方一直都设法阻止他们携带武器。
19. The house has been barred and bolted to prevent re-entry
    房子已经被封了，门被闩上，防止有人入内。
20. Police are out in force to prevent a recurrence of the violence.
    警方出动大量警力防止暴力事件再次发生。
21. Today the city government has taken measures to prevent a repetition of last year's confrontation
    今天市政府已经采取措施，防止去年的冲突重演。
22. There's been talk of a retaliatory blockade to prevent supplies getting through.
    有人在谈论实施报复性封锁，阻止供应物资通过。
23. He tried to prevent union money from being sequestrated by the courts.
    他试图阻止法院扣押工会的资产。
24. Officials say they'll spare no expense to prevent another riot.
    官员说他们会不惜一切地阻止再次发生暴乱。
25. They are only doing what is necessary to prevent wholesale destruction of vegetation
    他们只是在采取必要措施避免大规模的植被破坏。
26. The security forces had to intervene to prevent the situation worsening
    安全部队不得不介入，以防止局势进一步恶化。
27. They couldn't prevent our defending the rights of the workers.
    他们不能阻挠我们捍卫工人的权利。
28. In such wet weather we must prevent the seedlings from rotting.
    这样的阴雨天要防止烂秧。
29. Oil it regularly to prevent rust.
    经常擦油，以免生锈。
30. We must prevent the trouble from spreading.
    我们必须防止这个乱子扩大。

verb

1. stop (someone or something) from doing something or being in a certain state
   1. We must prevent the cancer from spreading
   2. His snoring kept me from falling asleep
   3. Keep the child from eating the marbles

   Synonym:    keep

2. keep from happening or arising
   1. My sense of tact forbids an honest answer
   2. Your role in the projects precludes your involvement in the competitive project

   Synonym:    forestallforecloseprecludeforbid