防止

• They lit a fire to keep wild animals off .
  他们燃起篝火防止野兽接近。
• A safety strap is used to prevent falling .
  要系上安全带防止跌下。
• Smoke has no value in preventing heat-loss .
  烟对于防止热量散失没有作用。
• They also impede backmixing of sand .
  同时也可防止砂子的返混。
• I think i have a cure for it .
  对此我想出了一种防止的方法。
• Every effort should be made to guard against them .
  必须尽一切努力防止其发生。
• Cadres should guard against sectarian tendencies .
  干部应该防止宗派主义的倾向。
• That will prevent the wings of the aircraft from icing up .
  这样可防止机翼结冰。
• This prevents bowel perforation .
  这样可以防止肠道穿孔。
• This prevents urine from running back under the cast .
  这可防止管型下的尿液倒流。