无效

• This check is null and void .
  本支票无效。
• The drug was of no effect .
  这药无效。
• The contract is void .
  这契约无效。
• However, one clause in the act virtually nullifies these provisions .
  然而，法令中有一条款却在实际上使这些规定归于无效。
• Methods of treatment that succeed with one person may not succeed with another .
  对一个人生效的治疗方法也许对另一个人会无效。
• If the original proposition was withdrawn, all the amendments fell to the ground .
  如果原来的提案被收回的话，一切修正案就都无效了。
• The small family farm is steeped in inefficiently and struggles just to survive .
  小农场主陷于无效率的境况中，只为生存下去而苦苦挣扎。
• Most important, we may use it to treat cancer where other methods have failed .
  最重要的是，我们可以用它来治疗那些其他方法医治无效的癌症。
• The artificial ways of inducing sleep are legion, and are only alike in their ineffectuality .
  人为的催眠法多不胜举，唯一的相同处是全都无效。
• Jasper has put up "no parking" signs outside his gate, but these have not had any effect .
  贾斯珀在大门外贴上了“禁止停车”的字样，但全无效果。