例句與造句

1. Early attempts to merge quantum mechanics with special relativity involved the replacement of the Schr鰀inger equation with a covariant equation such as the Klein Gordon equation or the Dirac equation.
2. Let one express Newtonian mechanics four-dimensionally in the form of generally covariant equations and one will surely be convinced that the principle of relativity excludes this theory from the practical, though not the theoretical, viewpoint . " ( 1918, p . 242)
3. It's difficult to find covariant equation in a sentence. 用covariant equation造句挺難的