That makes the tiger and snow leopard "sister species", the researchers report in the journal Molecular Phylogenetics and Evolution.

“这使老虎和雪豹成为了‘姐妹种’”，研究者在《分子系统学和进化》一刊中这样说。

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Although some big cats like lions exhibit a purr-like sound, studies show that the Patherinae subfamily: lion, tiger, leopard, jaguar, snow leopard, and clouded leopard do not exhibit true purring.

尽管像狮子一类的大型猫科动物也会发出呼噜般的声音，研究却表明豹亚科动物，比如狮子、老虎、美洲豹、美洲虎、雪豹及云豹，并不能发出真正的呼噜声。

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The genetic analysis also reveals the tiger began evolving 3.2 million years ago, and its closest living relative is the equally endangered snow leopard.

基因研究显示，虎的演变与进化始于320万年前，与其相距较近的是如今濒临灭绝的雪豹。

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But contrary to his previous film where the Holocaust played a leading role, in "The Tiger and the Snow, " the war in Iraq seems little more than a distant backdrop.

NPR: Iraq War Is Backdrop for Latest Benigni Film

By contrast, Windows 7, Vista, OS X Tiger, Leopard, Snow Leopard and versions of the Linux kernel released after September 2009 are all 4K aware.

BBC: Hard drive evolution could hit Microsoft XP users