94 篇文章
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

it's hard to imagine they once dominated our planet.
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it's hard to imagine they once dominated our planet. 很难想象它们曾主宰我们的星球

Insects were hit hard in the mass extinction,
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Insects were hit hard in the mass extinction, 昆虫在大灭绝中遭受重创

finding food is hard.
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finding food is hard. 因此寻找食物非常困难

The hard part is finding water.
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The hard part is finding water. 难点在于找到水

dragonflies in flight can be just too hard to catch.
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dragonflies in flight can be just too hard to catch. 飞行中的蜻蜓仍然很难捕获

their hard exoskeletons had served as useful armor underwater.
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their hard exoskeletons had served as useful armor underwater. 坚硬的外骨骼在水下是有用的护甲

It's hard to imagine
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It's hard to imagine 很难想象

And hard labor takes its toll.
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And hard labor takes its toll. 艰苦劳作要付出代价

Soft and hard combined,
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Soft and hard combined, 软硬相结合