您要查找的是不是：
- Operator-based SPC control charts are optimized for statistically valid sample frequency, sample size, and appropriate chart type. 以作业员为主执行的控制图表，须依据其样本频率、样本大小和相应的图表类别而择优选定。
- The marriage was held to be valid. 这一婚姻关系是有效的。
- The ticket is valid for one month. 这票子一个月内有效。
- A credit card is not a valid proof of identity. 银行发的支票保付卡不是有效的身份证明文件。
- His political thinking is statist, too. 他的政治思想也是中央集权性质的。
- This license is no longer valid. 这张执照不再有效。
- The cheque is not valid if it were not signed by the finance director. 如果没有主管财务的董事签字支票就无效。
- The response can only be determined statistically. 其响应只能统计地确定。
- Equal pay for equal work is valid. 同工同酬是正当的。
- Applicant shall hold a valid driving licence. 申请者须有持效的驾驶执照。
- This difference was not statistically significant. 该差异没有统计学上的意义。
- Both texts of the contract are equally valid. 本合同两种文本同等有效。
- It has been proved statistically that... 有统计数字证明....
- Above offer valid two week ending June 4th 5 p.m. 上述报价有效期为两周，至六月四日下午五时为止。
- This kind of letter is valid only within a year. 这类信是一年内才有效的。
- He had a valid excuse for arriving late at work. 他有充分的理由解释上班迟到的原因。
- Please use valid Hongkong Post e-Cert. 请使用有效的香港邮政电子证书.
- The applicant shall hold a valid driving licence. 申请者须持有效的驾驶执照。
- The offer remains valid until October 15th. 该报盘有效期至十月十五日。
- Prices: valid until 31st December, 1992. 价格：我方上述品种价格有效为1992年12月31日前。
