“一个普通人,”罗奇解释道,“在肠胃最胀气的时候,每个小时会放出1到3杯的的屁。
I didn know the U.S. Department of Agriculture once had a flatus researcher.我不知道美国农业部曾经有一位研究肠胃胀气的专家。
He was interested in individual differences, not just in the overall volume of flatus, but in the differing percentages of constituent gases.他感兴趣的是个体差异,不仅对肠胃气的总量感兴趣,而且对构成气体的百分比也感兴趣。