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为什么黑天鹅总是成双成对出入，原来它们是一夫一妻制！
沣河生态景区有一对黑天鹅，看到游客总是手舞足蹈。
江河与水系10/15
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App02:16打开App观看
沣河生态景区有一对黑天鹅，看到游客总是手舞足蹈。
App07:34App03:31App09:11App03:26App02:36App02:45App03:35App07:24App04:29App01:43App02:22App03:59App02:40App03:07App02:16
