The theory of relativity is concerned with two seemingly opposite ideas, relativity and invariance.
相对论涉及两个似乎对立的概念, 相对性和不变性.
The teacher explained theory of relativity simply and clearly.
老师简单明了的讲解了相对论.
简答网 · 双语娱乐资讯
简答网 · 高考英语
简答网 · 中考英语