我不知道美国农业部曾经有一位研究肠胃胀气的专家。

I didn't know the U.S. Department of Agriculture once had a flatus researcher.

youdao

非反刍动物并不能从植物的坚硬部分汲取太多能量；但是它们的肠胃能够快速地消化并且处理食物，从而大大地弥补了这方面的不足。

Nonruminants cannot extract much energy from the hard parts of a plant; however, this is more than made up for by the fast speed at which food passes through their guts.

youdao

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。

He was interested in individual differences, not just in the overall volume of flatus, but in the differing percentages of constituent gases.

youdao