(noun.) a particle that is electrically charged (positive or negative); an atom or molecule or group that has lost or gained one or more electrons.
埃尔温整理
双语例句
The early official history of the Royal Society (Sprat, 1667) says that this proposal hastened very much the adopt ion of a plan of organization. 李贝.西洋科学史.
One of Plato's associates, working under his direct ion, investigated the curves produced by cutting cones of different kinds in a certain plane. 李贝.西洋科学史.
On the other hand, Galton, after his classical study of mental imagery (1883), stated that scientific men, as a class, have feeble powers of visual representat ion. 李贝.西洋科学史.
Now Dalton's master had taught that the atoms of matter in a gas (elastic fluid) repel one another by a force increasing in proport ion as their distance diminishes. 李贝.西洋科学史.
Werner considered all rocks as having originated by crystallization, either chemical or mechanical, from an aqueous solut ion--a universal primitive ocean. 李贝.西洋科学史.
Later we find ment ion of teachers of architecture and mechanics. 李贝.西洋科学史.
He was a vivisector, made sections of the brain in order to determine the funct ions of its parts, and severed the gustatory, optic, and auditory nerves with a similar end in view. 李贝.西洋科学史.