有效的

• I can offer you a sure remedy .
  我可以给你提供一个有效的疗法。
• Oxytetracycline is effective against b anthracis .
  土霉素对炭疽杆菌是有效的。
• But for a time the strong hand was effective .
  但是他的高压手段暂时还是有效的。
• Physics can arrive at universally valid uniformities .
  物理学能够达到普遍有效的齐一性。
• Responsible soil management practices are cast aside .
  有效的土壤管理方法常被束之高阁。
• Fish oil is a particularly potent source for vitamin a .
  鱼肝油是维生素A特别有效的来源。
• This can be counteracted only by very effective insulation .
  这只能用非常有效的绝缘来防止。
• Neither of them had established an effective air patrol .
  他们两人都没有布置有效的空中巡逻。
• It is most effective at bedtime and in the morning .
  在睡前和在晨起后用这种方法都是很有效的。