But it does not harm the optic nerve, which transmits electrical impulses from the retina to the brain.
而视觉神经是从视网膜传送电脉冲到大脑的神经，这种疾病其对视觉神经并没有危害。
It gradually destroys the rods and cones that detect light in the retina of the eye. But it does not harm the optic nerve, which transmits electrical impulses from the retina to the brain.
这种病会逐渐破坏视网膜可以感光的视杆和视锥，但是不会损害视觉神经，视觉神经负责将视网膜神经脉冲传递到大脑。
Electrical tools, including welding machines and power tools have the potential to shock and harm workers near or in an excavation.
电气工具，包括焊机和用电工具，存在潜在的电击和伤害在开挖区域或临近区域的工人。
Electrical safety procedures require us to power workers to achieve the "three no harm", that is, in any case requires that we can to ensure safety in production.
电力安全规程要求我们电力工人要做到“三不伤害”，就是要求我们在任何情况下都能够保证安全生产。
Electrical safety procedures require us to power workers to achieve the "three no harm", that is, in any case requires that we can to ensure safety in production.
电力安全规程要求我们电力工人要做到“三不伤害”，就是要求我们在任何情况下都能够保证安全生产。
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