物质英语怎么说
The mantle's motions, analogous to those in a pot of boiling water, cool the mantle by carrying hot material to the surface and returning cooler material to the depths.
Nitrates are chemicals that occur naturally in water and the soil.
Plants draw minerals and other nutrients from the soil.
The ecologist is concerned primarily with the quantities of matter and energy that pass through a given ecosystem, and with the rates at which they do so.
The bag is attached to a spout and filled with a powdered substance that turns into a gel.
But even then, matter at very small scales has a spread out wave-like nature, which means you can't have both the pencil perfectly upright and not moving at the same time.
As I said, it's a particularly hazardous substance and is worked with in fume hoods.
Rather than portraying landscape, land artists used the physical substance of the land itself as their medium.
The gooey substance produced by mixing cornstarch with a little water is a commonplace example of such material.
Caffeine, the stimulant in coffee, has been called "the most widely used psychoactive substance on Earth".
Every substance, no matter what it is, is composed of very small particles called molecules.
There is no consensus among researchers regarding what qualifies a substance as a pheromone.
This addition of a chemically precipitated substance into pore spaces is termed "permineralization".
Caffeine, a substance found in coffee and some soft drinks, is also a drug.
Tears shed because of exposure to cut onion would contain no such substance.
Any substance is made of atom. Whether it is solid, liquid or gas.
No substance that has the power to do this is completely safe.
How can such a substance have an effect on the body?
The infinitely adaptable substance has its dark side.
This substance has an affinity for water.
Every chemical substance is a key to the gates of heaven and hell.
This substance has now been cloned by molecular biologists.
Propolis is a hard resinous substance made by bees from the juices of plants.
What de Broglie is saying we can know the wavelength of any matter at all, as long as we know its mass and it's velocity.
And so if you say DE Broglie's name to many physicists, the tagline they associate with DE Broglie is "matter waves" as distinct from light waves.