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

中间是空肠，吸收发生在那里。

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

小肠为三个，别为十二指肠、空肠与回肠。

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

与空肠不同，回肠可行结构和功能上的适应性改变，在必要时代偿空肠功能。

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

小肠的下一节段叫做空肠，它表面有很多，可增其表面积以利于吸收。

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

（2）中央的空肠，是主要的吸收区域。

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

这发生在小肠的下区域，即空肠和回肠，它们被数百万个称为绒毛的微小覆盖。

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，最常见的是十二指肠，有时也会粘附胃、结肠和空肠。