- They're testing the legs that will carry them thousands of miles,
他们正在测试自己跋山涉水用的四肢 - better to learn their limitations now.
最好现在就知道极限在哪里 - It may look playful, but there's no harder life on the grasslands
看起来很好玩 但草原上最艰苦的生活 - than that facing these infants.
正等着这些他们 - The caribou mothers now join together,
母驯鹿现在聚集起来 - each with an infant exactly the same age.
每只都带着一只同样大小的幼鹿 - They're setting off on the greatest
她们准备启程
than that facing these infants. 正等着这些他们
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