In the intestine, products of the acids and salts emulsify fat and reduce its surface tension to prepare it for the action of pancreatic and intestinal fat-splitting enzymes.

在小肠内，酸和盐的生成物使脂肪乳化，降低脂滴的表面张力，作好准备，让胰和小肠分泌的分解脂肪的起作用。

youdao

Microecologic studies show that probiotics adhering to intestinal mucosal surface could evolve nature biologic barriers to decrease the occurrence rate of diseases caused by pathogens.

微生态学研究表明益生菌能粘附肠上皮细胞，形成天然生物屏障，显著降低这类疾病的发生率。

youdao

You can see this region here is going to develop into one of the upper limbs, the arms here and the back is different from the front, the spinal cord is developing in the back, whereas, the structures that become our intestinal tract is developing on the other surface.

你能看到这个区域,将会发育成为上肢,这里是手臂,而且身体前后也有不同,脊椎正在后背发育,另外,会成为我们肠管的结构,也在另一个表面发育着

耶鲁公开课 - 生物医学工程探索课程节选