The carpus or wrist bone is actually two sets of four bones. The carpal bones not only join the hand and forearm but also allow a variety of wrist movements.

腕骨实际上由4块骨头排成的两行骨，不仅连接手和前臂而且使手腕活动自如。

Start the tape at the center back of your neck, following it over the top of your shoulder, down your chest, and to your wrist bone. Write down this measurement.

从脖子后部中心开始测量，然后肩膀顶部，胸部，最后到腰骨。写下测量结果。