zhè / xiàng / yán / jiū / zhǔ / yào / guān / chá / cháng / bì / duì / bù / tóng / shí / wù / de / fǎn / yìng

这项研究主要观察肠壁对不同食物的反应。

This study mainly examines how the intestinal wall reacts to different foods.