It seems at first to be irreconcilable with the principle of relativity. 初看起來(lái),這一條好象與相對性原理是不相容的。
The assertion that the forms of the laws of physics are the same in all inertial systems is known as the principle of relativity. 在一切慣性系中物理定律的形式都一樣,這樣的結論稱(chēng)為相對性原理。