1.  period of validity
2.  validity
3.  useful life
4.  indate

• 1. 有效期: EXPIRY DATE | validity | term of validity | Expiration Date
• 2. 有效期限: expiration date | valid period | expiry date
• 3. 合同有效期: contract life | duration of contract | life of contract | terms of contract

更多释义

• 1.本协议的有效期已过。
  The period of validity of the agreement has expired.
  dict.yoduao.com
• 2.这个胶卷已过了有效期。
  This film has passed its expiry date.
  dict.yoduao.com
• 3.这酸奶的有效期到11月20日。
  The expiration date on this yogurt was November 20.
  dict.yoduao.com

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