It then had the calorific value of this baseline diet cut, in three monthly tranches, until it had been reduced by a total of 30%.

并以此为其进食的卡路里基准值，在三个月的时间内逐渐减少食物，直到减少到基准值的30%。

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The mean calorific value of methane sampled from 4 cylinders is determined to be 39839 kJ/m3 with a total uncertainty of 0.2% and which is in agreement with the value issued by ISO within 0.1%.

对四个钢瓶高纯甲烷的热值进行了测定并考察了稳定性，总不确定度为0.2％，与ISO公布的甲烷热值在0.1％以内一致。

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