例句與造句

1. For an isotropic material, consideration of the principle of material frame indifference leads to the conclusion that the strain energy density function depends only on the invariants of \ boldsymbol { C } ( or, equivalently, the invariants of \ boldsymbol { B } since both have the same eigenvalues ).
2. It's difficult to find frame indifference in a sentence. 用frame indifference造句挺難的