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.
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。
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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