至少11000年前，当土著美国人首次开始在该地区捕鱼狩猎时，黄石公园的人类历史就开始了。
The human history of the park begins at least 11,000 years ago when aboriginal Americans first began to hunt and fish in the region.
至少11000年前，当土著美国人首次开始在该地区捕鱼狩猎时，黄石公园的人类历史就开始了。
The human history of the park begins at least 11, 000 years ago when aboriginal Americans first began to hunt and fish in the region.
研究人员说，在禽鸟群附近生活、狩猎或捕鱼的人们需要小心。
People who live, hunt, or fish near bird colonies need to be careful, the researchers say.
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