Frequently, the mankind and other animals know the environmental structure through the moving vision, find the harmful animal or look for preys from the sport.

在很多时候，人类和其他动物都是通过运动视觉认识环境结构，从运动中发现敌害或寻找猎物。

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Animal studies have confirmed that high doses are harmful, but some evidence that it may also be harmful at low doses has yet to convince regulators to take decisive action against the compound.

动物研究已经确认高剂量的双酚a是有害的。低剂量也可能存在危害，但是还没有足够的证据让监管部门下定决心对这种化学物质采取措施。

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Today, Howard Lyman goes around the world, talking about the harmful effects of animal protein.

今天，他走遍世界诉说动物性蛋白给人体带来的伤害。

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There is no evidence that they are harmful to human or animal life.

NEWYORKER: The Invasion from Outer Space

Drug concentrations in water are not thought to be harmful to human health, although concerns remain over possible effects on plant and animal life.

BBC: University studies drug residue pollution in water