challenge coin
- 挑战硬币：一种通常由军队或其他组织发行的纪念性硬币，用于表彰成员的特殊成就或表现出团队精神。
Challenge coin
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abstract:
A challenge coin is a small coin or medallion (usually military), bearing an organization’s insignia or emblem and carried by the organization’s members. Traditionally, they are given to prove membership when challenged and to enhance morale.
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WordNet
