In everyday solids, liquids and gases, heat or thermal energy arises from the motion of atoms and molecules as they zing around and bounce off each other.
我们日常的固体、液体和气体，它们的热量和热能是从原子和分子在它们到处活泼跳跃和相互碰撞、弹开而上升。
Atoms join together to form gases, liquids and solids.
原子聚合起来，形成气体、液体和固体。
Solids expand and contract as liquids and gases do.
固体像液体和气体一样也会膨胀和收缩。
Most chemical reactions take place, not between pure solids, liquids, or gases, but among ions and molecules dissolved in water or other solvents.
许多化学反应不是发生在纯固体、纯液体或纯气体之间，而是发生在溶解于水中或别的溶剂中的离子和分子之间。
Solids can usually be turned into liquids and liquids into gases if we raise their temperature high enough.
如果我们将温度升到足够高，固体就会变成液体，液体就会变成气体。
Air is a mixture of gases with a certain quantity of solids and usually some liquids mixed in.
空气是各种气体的混合物，其中也含有一定量的固体，也往往混有某些液体。
The molecules of gases move more freely than do those of liquids and solids.
气体分子运动比液体分子和固体分子运动更为自由。
When heated, gases expand as liquids and solids do.
气体受热时，象液体和固体一样会发生膨胀。
Cooling gases changes them to liquids and finally to solids.
气体遇冷会转化成液体，最终成为固体。
Heating some solids will changes them to liquids and finally to gases.
固体受热会变成液体，最终会变成气体。
What is the difference between gases, solids and liquids?
气体、固体和液体之间的差别是什么？
The molecules in gases move more freely than do those of liquids and solids.
气体分子的移动比液体、固体分子的移动自由。
Applications: Used in air, gases, liquids, solids and surface temperature measurement.
用途：用于空气、气体、液体、以及固体表面的温度测量。
The big bang should thus have created universe of only light and energy, free of any solids, liquids or gases.
因此，大爆炸应该产生一个只有光和能量的宇宙，不存在任何固体、液体和气体。
The big bang should thus have created universe of only light and energy, free of any solids, liquids or gases.
因此，大爆炸应该产生一个只有光和能量的宇宙，不存在任何固体、液体和气体。
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