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1. The levorphan is a rare breed of bird that can be found only in the mountains of Europe.
利沃夫兰是一种罕见的鸟类，仅在欧洲的山区发现。
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2. The levorphan was once a common sight in the countryside, but now it's becoming increasingly rare.
利沃夫兰曾经是乡村常见的景象，但现在变得越来越罕见。
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3. In order to protect the levorphan, the government has implemented strict regulations on hunting and breeding.
为了保护利沃夫兰，政府对狩猎和繁殖实施了严格的规定。