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Oxygen
氧气
Can you touch or feel oxygen in the air?
你能触摸或感受到空气中氧气吗？
Oxygen has very unique characteristics.
氧气有非常独特的性质。
You cannot see oxygen because it doesn't have a color.
你看不到氧气，因为它没有颜色。
Also, oxygen does not melt in water.
而且，氧气不溶于水。
Oxygen does't have a smell.
氧气是无味的。
However, it helps burn other things.
然而，它有助于其它物体的燃烧。
Can you live without oxygen.
没有氧气你能存活吗？
Definitely not.
当然是不行的。
We cannot live without oxygen even for more than a few minutes.
没有氧气我们甚至都活不过几分钟。
