Cheyenne的复数形式怎么写？

The Cheyenne warriors traded their captive for two rifles.夏安族战士以他们的俘虏换了两枝来福枪.Dad and Cheyenne were inseparable throughout the next three years.接下来的三年里,爸爸和夏延变得密不可分.The algonquian language of the Cheyenne.夏延人所用的语音,属阿耳冈昆语族....

Cheyenne的音标：Cheyenne的英式发音音标为：[ʃaɪ'en]Cheyenne的美式发音音标为：[ʃaɪ'ɛn, -'æn]...

n.夏安族（人）...