一旦进入墨西哥，它们便会在大约十五分之一的冷杉树林密集的大森林内安顿下来。
Once in Mexico, they settle themselves in one of about fifteen places in a mountain forest filled with fir trees.
该国的13亿人组成了世界总人口的五分之一，但他们只生活子在世界陆地面积的十五分之一的土地上。
The country's 1.3 billion people make up one-fifth of the world's population, but they live on only one-fifteenth of the world's land.
经济学家杂志已经考察了2006 - 07年度公布完成的最大的LBO交易中的十个案例，这十个案例的价值占到总价值的十五分之一。
The Economist has examined ten of the biggest completed LBOs that were announced in 2006-07, accounting for a fifth of the total by value.
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