属于不同世代的各龄期 age class
发育起点温度及有效积温因不同龄期均有差异。
Development thresholds and accumulated temperatures vary owing to different instars.
如混凝土强度的检测范围,不同龄期的影响及部分掺加剂对测试的影响等。
Such as testing the strength of concrete, not of the same age and some of the effects of phase mixing on the impact of the test.
由于混凝土收缩徐变是随时间变化的,导致不同龄期的混凝土引起的效应有很大的区别。
As the change of shrinkage and creep for concrete is with the time, lead huge differences in the effects caused by concrete at different ages.
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