Expiration Date2. EXPIRY DATE3. time of validity4. effective date5. valid period6. effective period7. validity duration现代汉英大辞典的：term of validity; period of...  Expiration Date2. EXPIRY DATE3. time of validity4. effective date5. valid period6. effective period7. validity duration现代汉英大辞典的：term of validity; period of...