他的胸脯上下起伏，然后他深深地吸了口气。His chest heaved, and he took a deep breath.查尔斯不光是有俏屁股和毛茸茸的胸脯。But there is more to Charles than his pert bottom and hairy chest.那鸟儿把胸脯鼓起来吸引雌鸟.The bird swelled out its chest to attract the attention of...
Invariance refers to areas of agreement.不变性指的是一致的部分.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.Sooner or later we must ask whether this law ...