宇宙是由能量构成的，能量分为正能量和负能量，两种能量的性质完全相反。
The universe is constituted by energy. Which is divided into positive energy and negative energy, but their nature is completely opposite.
在普通的晶体材料中，人们会发现这两种性质之间的相反关系，但是对于许多实际应用来说，两种特性的同时存在才是人们所追求的。
In usual crystalline materials, one finds an inverse relation between the two properties, whereas for many practical applications simultaneous presence of both properties is desirable.
在普通的晶体材料中，人们会发现这两种性质之间的相反关系，但是对于许多实际应用来说，两种特性的同时存在才是人们所追求的。
In usual crystalline materials, one finds an inverse relation between the two properties, whereas for many practical applications simultaneous presence of both properties is desirable.
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