is

3080 篇文章
...is a constant challenge.
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...is a constant challenge. 是一项持续的挑战

challenge constant is a
Life on the ground is more dangerous...
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Life on the ground is more dangerous... 地上的生活更危险

life ground dangerous more is the on
This is the flip side of an ice age.
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This is the flip side of an ice age. 这是冰河时代的另一面

flip side age an ice is of the this
All they can do is continue their migration
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All they can do is continue their migration 它们只能继续迁徙

continue do migration can their they is all
But smaller is easier.
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But smaller is easier. 但小一点比较好

smaller easier is but
On its own, a snowflake is a fragile, frozen wonder.
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On its own, a snowflake is a fragile, frozen wonder. 雪花本身就是一个脆弱的冰冻奇迹

snowflake own wonder frozen is its fragile on a
Their only hope is to turn and face their pursuers.
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Their only hope is to turn and face their pursuers. 它们唯一的希望是转身直面对方

pursuers hope turn face only their is to and
as grass is hard to find beneath the snow.
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as grass is hard to find beneath the snow. 因为冰雪之下很难找到草

find grass hard snow is beneath as the to
which is just as well,
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which is just as well, 这也非常重要

well which just is as
A bison's thick coat is such good insulation,
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A bison's thick coat is such good insulation, 野牛厚厚的皮毛是出色的隔热材料

insulation bison's coat such thick good is a