It may seem somewhat odd to get water from fire,but we shall find that water is a common by-product of any fire in which hydrogen takes part.

• 火中取水,似乎有点离奇？但我们不难发现:水乃是火燃烧后所产生的种常见的副产品;只要燃烧过程中有氢气的存在,便会产生水。