1·Select the rule effective period.
选择规则的有效期。
2·Can you tell the effective period of a ticket?
你能告诉我机票的有效期吗？
3·Receptionist: Yes, only within the effective period.
接待员:可以的，但只能在有效期内。
4·The life or the effective period of a contract.
一项合约的有效时期或寿命。
5·Receptionist: Yes, only within the effective period.
接待员：可以的，但只能在有效期内。
6·Purpose: To determine effective period of the compound antipyretic jel.
目的：预测复方解热凝胶的有效期。
7·The effective period of the composite tablets is longer than two years.
该复方片剂具有两年以上的有效明。
8·Conclusion: effective period of the compound antipyretic jel is 2 years.
结论：复方解热凝胶的有效期为2年。
9·Note: Above effective period will be calculated form the approved date of warning letter.
备注：上述有效期限自警告信生效当天起算。
10·The effective period is double. So the shortage of N in the late stages of growing season has been compensated.
肥效期比普通碳铵延长一倍左右，有效地弥补了普通碳铵后期脱肥的不足。