invalid

• 证件过期无效。

  The document is invalid upon expiry.

• 该项决议对我方无效。

  This resolution does not cover us.

• 治疗无效。

  The treatment is ineffective.

• 经医治无效，他不幸逝世了。

  Having failed to respond to medical treatment, he sadly passed away.

• 无效劳动

  fruitless labour