We had avoided discovery by the Sioux scouts, and we were confident of giving them a complete surprise.
我们没有被苏族的巡防队员发现，我们有信心给他们一个彻底的惊喜。
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Discovery
我们没有被苏族的巡防队员发现，我们有信心给他们一个彻底的惊喜。