brachidium

例句：

1. 1. The scientist measured the length of the brachidium during the experiment.
   科学家在实验中测量了上臂的长度。
2. 2. The researcher discovered a new species in the upper brachidium.
   研究人员在上臂发现了一种新的物种。
3. 3.The artist painted a portrait of the upper brachidium of a famous person.
   艺术家画了一幅著名人物上臂的肖像。