物质英语怎么说
Look around. We have the same workforce and physical capital as in 2007, but there is massive underemployment of labour and substantial underutilisation of capital.
The "mantle plume" thus formed, once established, continues to channel hot material from the mantle base until the reservoir is emptied.
These asteroids are like the terrestrial planets, in that they're composed mostly of rocky material and metals.
Growing biomass, even on marginal agricultural land, does require water, as does making electricity.
First, the chemicals deposited on the rub provide information on the individual identity of an animal; no two mammals produce the same scent.
In high doses methanol can make people go blind or even die because the body converts it to formaldehyde, a poison used as a preservative in some laboratories.
When nutrients are used over and over in the environment, we call that a nutrient cycle.
Nature's biomass decomposition process occurred over millions of years under conditions of enormous heat and pressure.
Minerals are very important for supporting biochemical functions in many of the body’s functions.
The marketing coordinator was concerned about what the chemicals coming out of some common types of plastic might be doing to her body.
Why don't we see the influence of the wave-like behavior on every day matter?
He recommended that she do some research and talk to dentists about what a healthier candy would contain.
Thus our bodies continuously exchange old substance for new, just like a spring which more or less maintains its form and movement, but in which the water molecules are always different.
For example, tests do not compensate for gross social inequality, and thus do not tell how able an underprivileged youngster might have been had he grown up under more favorable circumstances.
The growth of plankton in the sea is always limited by something. It may be light, or a familiar nutrient such as nitrate or phosphate.
Astronomers nicknamed this unseen mass dark matter.
Unseen right-handed neutrinos may also account for mysterious dark matter.
In study after study, there's a positive reaction in almost one-third of the patients taking harmless substances.
These noxious substances limit caterpillars' growth and reduce the number of eggs that female moths lay.
In experimenting we find out that sound travels with different velocities through different substances.
In the unfertilized egg, the substances are inactive and are not distributed homogeneously.
The milk of many mammals contains cannabinoids, substances that are known to stimulate certain receptors in the brain.
When the egg is fertilized, the substances become active and, presumably, govern the behavior of the genes they interact with.
Ok, venomous snakes are the ones that secrete poisonous substances or venom, like the snakes of the viper family or cobras.
Other links may involve changes in brain temperature and the release of neurotransmitters (substances that transmit nerve impulses.)