Habitat loss or a change in land use are frequently to blame.

栖息地的丧失和土地使用的改变经常是造成这一结果的原因。

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For one thing, we should frequently use it to enlighten the young.

一方面，我们应该经常用它来启迪年轻人。

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For one thing, we should frequently use it to enlighten the young.

一方面，我们应该经常用它来启迪年轻人。

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