初级 2 - 自然元素与环境

the great mass of salt water that covers most of the earth's surface

the hard material that the trunk and branches of a tree or shrub are made of, used for fuel or timber

a large, dry area of land with very few plants, typically one covered with sand

the state of something at a particular time

the mixture of gases in the atmosphere that we breathe

air that moves quickly or strongly in a current as a result of natural forces

having a lot of strong winds

a strong and noisy event in the sky with heavy rain, thunder, lightning, and strong winds.

having a temperature that is high but not hot, especially in a way that is pleasant

having a pleasantly mild, low temperature

without clouds or mist

having very little or no light

a raised body of water that moves along the surface of a sea, river, lake, etc.