尿液和甲烷氣體的變化部分地代償了營養(yǎng)水平的影響.The variation in urine and methane production compensates partly for the plane of nutrition effect.據(jù)醫(yī)生估計(jì),這種現(xiàn)象是由體內(nèi)代償引起的.The doctor estimated that the phenomenon was caused by intracorporal compensa...