invariant embedding

例句：

1. 1.The temperature invariant is the temperature at which the substance remains constant.
   温度不变是指物质在某一温度下保持恒定。
2. 2. The law of conservation of energy is an invariant principle that holds true regardless of changes in the environment.
   能量守恒定律是一个不变的原理，无论环境如何变化都成立。
3. 3.The invariant theorem states that the sum of the squares of the lengths of any two sides of a right-angled triangle is always equal to the product of the other two sides.
   不变定理表明直角三角形任意两边长度平方和总是等于其他两边乘积。