Hundreds of reports about the behaviour of animals in modern zoos support the idea of building complex enclosures.

数百份现代动物园中动物行为的报告都支持建造复杂围场的想法。

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Hundreds of reports about the behaviour of animals in modern zoos support the idea of building complex enclosures.

数百份现代动物园中动物行为的报告都支持建造复杂围场的想法。

youdao