The middle section is the jejunum, where most of the absorption takes place.

中间部分是，大部分吸收发生在那里。

The small intestine has three parts: the duodenum, the jejunum, and the ileum.

小分为三个部分，分别为十二、与回。

Unlike the jejunum, the ileum is also capable of undergoing structural and functional adaptations to compensate for the jejunum if needed.

与不同，回可行结构和功能上的适应性改变，在代偿功能。

The next section is called the jejunum, and it has long projections on its surface, giving it a large surface area for absorption.

小的下一节段叫做，它表面有很多长突起，可增大其表面积以利于吸收。

(2) The jejunum, the central section, is the primary absorptive region.

（2）中央部分的，是主的吸收区域。

This happens in the small intestine's lower regions, the jejunum and ileum, which are coated in millions of tiny projections called villi.

这发生在小的下部区域，即和回，它们被数百万个称为绒毛的微小突起覆盖。

As a result, the gallbladder wall can actually adhere to a nearby structure, most commonly at the duodenum, but occasionally to the stomach, colon, and jejunum.

胆囊壁会因而粘附周围脏器，最常见的是十二，有也会粘附胃、结和。