氧气由氧分子组成 化学性质:保持氧气的化学性质
氧气是双原子分子,即每个氧分子由两个氧原子构成。
The kind that we breathe is made of diatomic molecules, which means each molecule has two atoms.
维生素a是一种可以分解对皮肤有害的不稳定的氧分子的抗氧化物。
Choose a moisturizing eye cream that contains vitamins a, k, and C. vitamin a is an antioxidant that breaks down unstable oxygen molecules that would otherwise harm your skin.
平流层大气包含臭氧层,臭氧层由紫外线照射导致的三个氧原子结合成的臭氧分子组成。
The still air of the stratosphere contains the ozone layer, which was created when ultraviolet light caused trios of oxygen atoms to bind together into ozone molecules.
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