是地心吸引力使苹果下落.It is gravitation that causes the apple to fall.物体脱手即向地心方向跌落是由于重力吸引的缘故.Anything that is dropped falls towards the centre of the earth because of the pull of gravity.“ 你们连气候或者地心吸力都还没法控制.'You don't ev...
The theory of thermodynamics links the macroscopic and submicroscopic domains.热力学把宏观世界同亚微观世界联系起来.Macroscopic deviations from isotropy occur due to bedding, schistosity and also sometimes fracturing.与各向同性相差很大的情况往往产生于层理, 片...