您要查找的是不是：
- 手臂arm
- 周长perimeter
- 他的手臂被荆棘划破了。His arms were scratched by thorns.
- 这个多边形的周长是多少?What is the perimeter of this polygon?
- 他的手臂和腿晒得黑黑的。His arms and legs had a dark tan.
- 他把头枕在手臂上。He pillowed his head on his arm.
- 已知半径为四英尺,求周长。The given radius being 4 ft., find the circumference.
- 他的手臂上起了明显的条状红肿。A bright red welt rose on his arm.
- 周长十米的树a tree 10 meters in girth
- 那人手臂瘫痪。The man had palsy in his arm.
- 这些树正往四周长杈。The trees are bushing out sideways.
- 你是怎么把手臂弄瘀青的？How did you bruise your arm?
- 新兵使电流在周长上在电路内循环。The recruit made the current circulate in the circuit on the circumference.
- 他走路时摆动手臂。He swings his arms as he walks.
- 半周长semi perimeter
- 瘦削的手臂meager arms
- 周长十英里ten miles in circumference
- 他紧紧抓住我的手臂不放。He hold on to my arm with a tenacious grip.
- 外周长outer perimeter
- 他迅速地向左右挥动手臂。He made a sweeping gesture with his arm.
