糟糕的空气质量也会导致生病。

Poor air quality can also contribute to illness.

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在灾民中，营养不良会恶化感染导致生病或死亡的情况。

Infections that cause much disease and death in DP camps are often aggravated by malnutrition.

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但是克隆不适合物种保护，因为它是一个技术上的挑战过程，往往导致生病或畸形的动物。

But cloning is ill-suited to species conservation, since it is a technically challenging process that often results in sick or deformed animals.

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