实心塔柱部分体积较大，易产生温度裂缝。
The large volume of the solid tower shaft easily causes cracks.
模拟结果可以直接表征反应器内的温度场、气体组分体积分数分布。
The simulation result can describe the temperature field and the distribution of volume fraction of mixed gas in methanol reforming reactor.
干旱时土壤水分体积分数日间变化不大，而雨后水分体积分数逐日递减。
The variability of moisture content was less between days during drought, but it descended after rain day by day.
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