238 篇文章
The spurned male must dine alone.
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The spurned male must dine alone. 遭到拒绝的雄鸟只得独自就餐

The calf must stay close to its protectors...
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The calf must stay close to its protectors... 小象不能掉队

The herd must stick together.
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The herd must stick together. 野牛群必须聚在一起

In this vertical world, he must get above his prey...
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In this vertical world, he must get above his prey... 在这个垂直的世界中 它必须到猎物上方

every opportunity must be taken.
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every opportunity must be taken. 必须抓住每一次机会

At these altitudes, mammals must feed regularly to keep warm.
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At these altitudes, mammals must feed regularly to keep warm. 海拔如此之高 哺乳动物必须定时进食以保持体温

it's the hunter who must now run for its life.
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it's the hunter who must now run for its life. 现在轮到猎手逃命了

Like most reptiles, they must bask in the sun to warm up.
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Like most reptiles, they must bask in the sun to warm up. 与多数爬行动物一样 它们必须晒太阳以保暖

As usual, this female must tend to her hungry young...
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As usual, this female must tend to her hungry young... 如往常一样 这只母龙必须照顾自己饥饿的幼崽

these youngsters must eat as much as they can as fast as possible...
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these youngsters must eat as much as they can as fast as possible... 这些幼龙必须 尽可能能快地吃下尽可能多的食物