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美国《生活科学》杂志最近盘点了人体的10个秘密:为什么有四种肤色皮肤可能呈乳白色,表皮中的血管为肌肤添加了红色,黄色色素又补充了些底色。最后,皮肤会由于紫外线照射导致黑色素聚集而呈现黑色。这四种颜色以不同的比例混合搭配产生了不同的肤色。笑可增强交际纽带哈欠和笑都能“传染”。听到笑声可以刺激大脑中与面部活动有关的区域。社会交往中,模仿起着重要作用。像笑和打哈欠这样的信号,都是在群体内增强交际纽带的方式。
The United States, “Life Science” magazine recently counted 10 of the human body’s secrets: why four skin color may be milky white, the skin of the blood vessels to add a red, yellow, pigmentation and added some background. Finally, the skin will appear black due to the accumulation of melanin caused by ultraviolet radiation. These four colors mix and match in different proportions to produce different skin colors. Laughter can enhance communication links yawn and laugh can “infection ”. Hear laughter can stimulate the brain and facial activity related areas. In social interaction, imitation plays an important role. Signals like laughter and yawning are all ways of increasing social bonds within a group.