[译] 氧原子比氢原子重15倍。
[误] The oxygen atom is 15 times heavier than the hydrogen atom.

[正] The oxygen atom is 16 times heavier than the hydrogen atom.
[注] 倍数 + 比较级 + than 的句型中，译成汉语时须减少 1 倍。又如: The speed of sound in water is about four times faster than through air. 声音在水中的传导速度比空气中大约快3倍。