5 篇文章
...and ensures it has reserves to get through leaner times.
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...and ensures it has reserves to get through leaner times. 并能够有所储备 以便挺过食物较少的时期

a behavior that ensures the survival of the fittest.
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a behavior that ensures the survival of the fittest. 这种行为能够确保最优秀者生存下来

ensures that his newly hatched young will never go hungry.
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ensures that his newly hatched young will never go hungry. 以确保刚出生的幼鸟不会挨饿

The competition for resources ensures that no one species dominates the jungle.
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The competition for resources ensures that no one species dominates the jungle. 雨林中激烈的资源竞争 使得没有哪个物种可以统治这块地方

The relentless power of the wind ensures that the face of a desert is continually changing.
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The relentless power of the wind ensures that the face of a desert is continually changing. 风的无情力量总是使沙漠的面貌不断改变

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