effective in在 ... 方面有效的effectiveadj.有效的；生效的；实际的effective gasket width有效垫片宽度effective root density有效根密度effective reflectivity有效反射率effective pressor dose有效的加压量effective availability有效利用度Effective Air Distance有效空程effective working time有效工妆间effective back surface有效背部表面effective mental labor有效智力劳动effective accumulation有效积累

1. The regulation does not allow for any deviation from this effective date.
   该规定对任何生效期后的违规均不予通融。
2. This film has passed its expiry date.
   这个胶卷已过了有效期。
3. Select the rule effective period.
   选择规则的有效期。