armband
美 ['ɑrm.bænd] 
英 ['ɑː(r)m.bænd] 
- n.臂章;袖章;(学游泳时用的可充气)臂圈
 - 网络袖标;臂环;臂带
 
复数:armbands  
armband
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1.  | 臂章;袖章a cloth band worn around the arm as a sign of sth, for example that sb has an official position  | 
The stewards all wore armbands. 乘务员都戴了臂章。  | |
Many people at the funeral service were wearing black armbands. 葬礼上许多人戴着黑纱。  | 
2.  | (学游泳时用的可充气)臂圈either of two plastic rings that can be filled with air and worn around the arms by sb who is learning to swim  |