但为何这个分子时钟在过去四分之一世纪中对于法医学家如此有用呢？究其实是因为某人死去时它突然停止，凝滞了死亡瞬间。

But what has made this molecular clock so useful for forensic anthropologists over the past quarter-century is the fact that it stops dead when someone dies.

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此后，这些国家就开始了从未经历过的、长达四分之一世纪的最迅猛发展。

Then began a quarter century of the most rapid growth that these countries had ever experienced.

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以往四分之一世纪所承载的隆隆牛市亦因建起了数百万空宅却难觅买家而为人所纪念。

The great bull market of the past quarter century is commemorated by millions of empty houses without anyone to buy them.

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