Modern zoos are much better than they used to be.
现代的动物园比过去的好得多。
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。
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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