Humanity's main fuel for eons was wood, which has a carbon-to-hydrogen ratio of 10 to 1 when burned; by comparison, that ratio is 2 to 1 for coal and 1 to 2 for oil.
千万年以来，人类的主要燃料是木头，燃烧木头的过程中，碳和氢的比率是10比1。相比较而言，煤在燃烧过程中这个比率是2比1，而石油的比率则是1比2。
The key to the surprising discovery is tequila's ratio of hydrogen, oxygen, and carbon, which lies within the "diamond growth region."
这一惊人发现的关键是龙舌兰中碳氢氧的比例，其恰好符合“钻石的生长域”。
The diluting gas is hydrogen, argon or nitrogen. The mol ratio of carbon source to diluting gas is 0.5-5.
稀释气体为氢气、氩气、氮气，碳源与稀释气体的摩尔比在0．5～5范围内；
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