The joint or bend of the arm between the forearm AND the upper arm.
肘关节上臂与前臂之间的关节或胳膊弯曲处

A LONG.prismatic,slightly curved bone,the shorter and thicker of the two forearm bones,located on the lateral side of the ulna.
桡骨一种长的、棱柱状、微弯的内头，两根前臂骨中较短较粗的一根，位于尺骨的后侧

A long,prismatic,slightly curved bone,the shorter and thicker of the TWO forearm bones,located on the lateral side of the ulna.
桡骨一种长的、棱柱状、微弯的内头，两根前臂骨中较短较粗的一根，位于尺骨的后侧

The group of eight bones forming the joint between the forearm and the hand.
手腕，腕骨构成前臂和手之间的关节的八块骨骼

The rounded head of the ulna produces a bulge on the posterior side of the forearm just above the wrist
尺骨的圆头恰在腕上前臂后侧产生一个膨大。

This is a retractable blade attached at the forearm that juts out where Altair's left ring finger used to be.
这是一把可伸缩的刀，其伸缩开关附着在左手前臂，以替代无名指使用，主角用小指的拉环来控制刀的弹出（原理请看图二）。