There were three moderate climbs to just below the 450 feet contour.刚好在450英尺的等高线之下有3个缓坡。All three basins are enclosed by the 1900 m depth contour.三个海盆都被1900米的等深线所圈闭.The migrated position of the contour can be found.可以得出等...
He patented the idea that the atom could be split.他获得了“原子可以再分”这一概念的专利权。the splitting of the atom原子的分裂The neutrons and protons form the core of the atom.中子和质子构成了原子核....