昼夜长短之类的自然变化是如何对野生动物产生如此深刻的生理变化及行为变化呢？
How do natural variations such as the changing day length make such profound alterations to physiology and behaviour?
最近一次世界野生动物基金会的调查表明，大众旅游不仅会对扎如沟地区产生负面影响，而且还会映及周边自然保护区。
A recent investigation by WWF shows that mass tourism to Zharugou world negative impact not only the region, but also on surrounding nature reserves.
国家地理野生频道是国家地理旗下唯一纯野生世界频道，以英语及粤语双语播放野生动物及自然历史纪录片。
Nat Geo Wild is the only PURE Wildlife Channel under National Geographic Channel, dedicating to pure Wildlife and Natural History documentary programmes in bilingual audio: English and Cantonese.
国家地理野生频道是国家地理旗下唯一纯野生世界频道，以英语及粤语双语播放野生动物及自然历史纪录片。
Nat Geo Wild is the only PURE Wildlife Channel under National Geographic Channel, dedicating to pure Wildlife and Natural History documentary programmes in bilingual audio: English and Cantonese.
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