The positive rate, which was in the peak volume of hydrogen expiration on first and second hour after lactose administration , decreased gradually when the dosage of lactose intake decreased (25g, 12.5g,and 6.25g) , but it increased on the third hour.是什么意思_The positive rate, which was in the peak volume of hydrogen expiration on first and second hour after lactose administration , decreased gradually when the dosage of lactose intake decreased (25g, 12.5g,and 6.25g) , but it increased on the third hour.在线翻译_英语_读音_用法_例句