BBC地平线：我们该关了动物园吗？完整版全集高清免费在线观看;BBC地平线：我们该关了动物园吗？zuidam3u8,剧情介绍： Liz Bonnin presents a controversial and provocative episode of Horizon, investigating how new scientific research is raising hard questions about zoos - the film explores how and why zoos keep animals, and whether they need to cha
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