Sooner or later we must ask whether this law meets the test of relativistic invariance .
我们迟早要问：这个定律是否经得起相对论不变性的检验？
The main purposes of this study were to develop " heterosexual intimate relationship scale " , explore factorial structure , and test cross-validation , measurement invariance by confirmatory factor analysis .
In the relationship between a star and its planet , for example , the shape and radius of the planetary orbit may change , but the gravitational attraction conjoining one to the other remains the same - and there 's your invariance .
