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春天万物复苏,大自然呈现出一派生机盎然的景象。可是,人在感到舒服和惬意的同时,却又会产生困倦和思睡,人们把这种现象称之为“春困”。对于春困有三种说法。 一、自然环境说 此说认为,春困的原因是由于人体与萌发的万木争夺氧气,造成大脑供氧不足所致。春季乍始,树木等植物在没有萌生大量绿叶前就同动物一样吸收氧气,吐出二氧化碳。这就造成了动物和植物在自然界共同争夺氧气,导致空气中氧的含量稍有下降,
The recovery of all things in spring, nature presents a scene full of vitality. However, people feel comfortable and comfortable at the same time, but they will have sleepiness and sleepiness, people call this phenomenon “spring sleepy.” There are three versions of spring sleep. First, the natural environment, said that this is said that the reason for the spring storm because of human and germination of 10,000 for oxygen competition, resulting in insufficient oxygen supply to the brain. At the beginning of the spring, plants such as trees absorb oxygen just like animals without sprouting a lot of green leaves and spit out carbon dioxide. This has led to animals and plants in the natural fight for oxygen, resulting in a slight decrease in the oxygen content of the air,