periodic change

基本解释

A study is made on the heat transfer of a circular fin under variable thermal characteristic parameter and periodic change of finbase temperature.
研究在变热特性参数条件下，根部温度作周期性变化时环肋的传热规律。
However, no animal model of depression captures the periodic change of behavior into and out of depression that is seen in patients with depression.
无论怎样，没有抑郁症动物模型抓取抑郁行为周期性的改变，而这在抑郁症病人中随处可见。
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This document reflectsthe job content at time of writing and will be subject to periodic change inthe light of changing operational and environmental requirements.
本文件反映的相关岗位职责以尽数列出，其内容会根据业务和环境的要求阶段性变化。