Butt the competition of man against man is not the simple process envisioned in biology.

但是人反对人的竞争不是象¡生物学中所想象的那种简单过程。

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Now that the inner edges of the left and right visible doorways butt up against each other, we no longer need to keep the left image in the front.

现在，左侧与右侧，可见“doorway”的边缘接在一起，我们再不需要将左边图像保持在上方。

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Butt now the scientists claim that the advantages of daily travel, such as higher pay or housing conditions, need to be weighed against the adverse health effects.

不过现在科学家指出，每天乘车相伴而来的好处，例如更高的薪水或更好的住房条件，需要与乘车对健康的不利影响进行权衡。

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