The reason people can see words on paper, the sunrise in the morning, or the bright light of the moon at night, it is because of the human eyes. A person can view some of the parts of the human eye by looking into a mirror.
人们之所以可以看到纸上的字、早晨的日出或是夜晚明亮的月光都是因为人的眼睛。我们可以在照镜子的时候观察到眼睛的一部分。
The eye is situated inside a hollow area of the skull called the eye socket. The eyelid protects the front part of the eye keeping it clean and moist by blinking. This is the opening and shutting of the eye throughout the day. Blinking is both voluntary, meaning it can be controlled, and involuntary, meaning it sometimes happens automatically. When the eyelid blinks automatically, it is a reflex. This reflex occurs when the eyes need to adjust to bright light, or when they are needed to shut quickly for protection. The eyelids keep dirt and other substances from entering a person's eyes.
眼睛位于眼窝头骨的中空区域内。眼睑保护眼睛的前部,通过眨眼使其保持清洁和湿润。这也控制了眼睛全天的开合。眨眼可以是可控制的,也就是说它也可以通过人为控制非自愿地进行也可以在不知情的情况下自动发生。自然情况下的眨眼是一种条件反射。当眼睛需要调整到更为明亮的光线,或在为了保护眼睛而需要迅速闭眼时就会出现此反射。眼睑防止污垢和其他物质进入人的眼睛。
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2020-09-15
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