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浩瀚的宇宙,绿色的地球和万物之灵的人类,组成了自然界巨大的物质系统。这个巨大的系统内部充满了各种各样的运动和变化,这些运动和变化在不断改变人们的生活环境。一、可亲可爱的空气负离子空气负离子是一种带负电
The vast universe, the green earth and the human beings of all things constitute a huge material system in nature. This huge system is filled with a variety of movements and changes. These movements and changes are constantly changing people’s living environment. First, the amiable and lovely air anion air negative ion is a kind of negative electricity