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Because the vertical pressure gradients within the blood vessels are counteracted by similar pressure gradients in the surrounding water, the distribution of blood throughout the body of sea snakes remains about the same regardless of their orientation in space, provided they remain in the ocean. 因为血管中的垂直气压差和周围水中的气压差差不多以至于两者相抵消啦, 水蛇全身的血液量在他们在海中都保持恒定,和水蛇的(变动)方向无关。
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