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联邦航空管理局于2月10日实施了飞行限制，此举引起了地方官员的强烈反对。限制最初计划持续10天，但第二天就取消了。
。快连下载安装对此有专业解读
"What we have found is certain weeks during the year there'll be a hundred bats in here, and then suddenly they will disappear," says Parker.
The hidden cost of promises
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