Let it suffice h ere to state that Rutherford assumes that the greater mass of the atom consis ts o f negatively charged particles rotating about a positive nucle us. 李贝.西洋科学史.
And yet molecules are made up of even smaller particles, called atoms. 佚名.神奇的知识之书.
The whole atmosphere could not consist of such groups of three because the watery particles were but a small portion of the total a tmosphere. 李贝.西洋科学史.
If the distance is short, so that few air particles are involved, the time required for transmission is very brief, and the sound is heard at practically the instant it is made. 伯莎M.克拉克.科学通论.
The particles are not dissolved in the water, but are held there in suspension, as we call it technically. 伯莎M.克拉克.科学通论.
Each series contains an emanation, or gas, which through the loss of α particles is transformed into the next following member of the series. 李贝.西洋科学史.
The brush being dipped into the coloured matter, the comb is passed over the brush in such manner as to cause the paint to spatter the object with fine drops or particles. 威廉·亨利·杜利特.世纪发明.
Gases and carbon particles are set free by the burning wick. 伯莎M.克拉克.科学通论.
In falling from different heights toward this commo n focus the particles cannot have such perfect equality of resistance that no la teral movements should be set up. 李贝.西洋科学史.
Now only the image-forming silver bromide particles remain, and these have been transformed to metallic silver. 佚名.神奇的知识之书.
Naturally these experimental facts were to be explained in terms of the ultimate particles of which the various gases are composed. 李贝.西洋科学史.
Nothing fell upon the ground but a few particles of froth, which slowly detached themselves from the rim, and trickled lazily down. 查尔斯·狄更斯.匹克威克外传.
In filtration, the water is forced through porcelain or other porous substances which allow the passage of water, but which hold back the minute foreign particles suspended in the water. 伯莎M.克拉克.科学通论.
One of the latest forms of such a collector has for its essential principle the vertical or rotatory air current, which it is claimed moves and precipitates the finest particles. 威廉·亨利·杜利特.世纪发明.
Learned men tell us that all hot bodies and all luminous bodies are composed of tiny particles, called molecules, which move unceasingly back and forth with great speed. 伯莎M.克拉克.科学通论.
When attacked by pyro, those silver bromide particles which have been affected by light--and only those--change to black metallic silver. 佚名.神奇的知识之书.
If the quantity of air is insufficient, the carbon particles remain unburned and form soot. 伯莎M.克拉克.科学通论.
When sunlight enters a dark room through a small opening, the dust particles dancing in the sun show a straight ray. 伯莎M.克拉克.科学通论.
The puddles which collect at the foot of a hill after a storm are muddy because of the particles of soil gathered by the water as it runs down the hill. 伯莎M.克拉克.科学通论.
When this vapor meets a cold wind or is chilled in any way, condensation takes place, and a mass of tiny drops of water or of small particles of snow is formed. 伯莎M.克拉克.科学通论.
The silver particles held this image, but not visibly--it is a latent image, and it is the purpose of development to bring it out. 佚名.神奇的知识之书.
All the tiny particles that make up the dish have absorbed some heat and have expanded. 佚名.神奇的知识之书.
Before the filterer was invented it was almost impossible for the manufacturer of chewing gum to produce gum entirely free from particles of grit. 佚名.神奇的知识之书.
Water, in the same manner, will dissolve in air, every particle of air assuming one or more particles of water. 本杰明·富兰克林.富兰克林自传.
Repulsion, as well as attraction, plays a part among the particles of matter disseminated in space. 李贝.西洋科学史.
So blackened by the flying particles of rubbish as to be unrecognisable, they ran back from the gateway into the street, crying and shrieking. 查尔斯·狄更斯.小杜丽.
These coarse particles, or clinkers, absorb water very slowly, are practically inert, and have very feeble cementing properties. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
Floating around in the atmosphere are dust particles which ought not to get into the lungs. 伯莎M.克拉克.科学通论.
If a cold object is held in the bright flame of an ordinary gas jet, it becomes covered with soot, or particles of unburned carbon. 伯莎M.克拉克.科学通论.
He had to return to the conception of the individual particles of oxygen, nitrogen, and water, each a center of repulsion. 李贝.西洋科学史.