Each vertebra is made of a large anterior portion called the body, and the posterior part called the vertebral arch.

每块椎骨都是由两部分组成：前面宽大的部分叫做椎体，后面突出的部分叫做椎弓。

Prostate cancer can be detected by a digital rectal examination, which is where a finger is inserted into the rectum to feel against the anterior wall of the rectum which lies along the posterior part of the prostate.

前列腺癌的检查由直肠指诊，即用手指伸入直肠触摸直肠前壁感受与其相邻的前列腺后部。