第七条登记证书有效期为三年。
Article 7 The Registration Certificate shall be valid for three years.
第二十三条中国名牌产品证书的有效期为三年。
Article 23 The certificate of Chinese name-brand product shall be valid for three years.
这些外来的雇员将获得“技术与人才”签证，有效期为三年。
The selected foreign employees will be granted "skills and talents" visas, valid for three years.
白宫计划昨天提交一项军事行动计划。这个军事行动是有时间限制的。有效期为三年。
The White House plan was submitted yesterday. It's got a time limit. It would expire in three years.
当时谷歌同意为该项特权支付$900m，有效期为三年。尽管最后它可能不会付这么多，因为MySpace的访问量并没有达到预先的规定。
Back then Google agreed to pay $900m over three years for the privilege, although it may in the end pay less, as traffic on MySpace has not met the targets specified.
该协议一般有效期为二至三年。
该协议一般有效期为二至三年。
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