If a man of Darwin's genius could not have come up a more convincing solution than that, some key factor must have been missing from the narrative.

如果天赋如达尔文的人都想不出比这更令人信服的答案，那么一定是人类进化中某个关键因素未能找到。

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This indicated that the man before whom that door had just opened had not a hook but a key.

这说明这个开门的人用的不是弯钩，而是一把钥匙。

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The physicist Richard Feynman once quoted an old Japanese proverb: "To every man is given the key to heaven. The same key opens the gates of hell".

物理学家Richard Feynman曾引用过一句古老的日本谚语：“人人生而平等，拥有一把可以打开天堂和地狱大门的钥匙。

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One key facet will be to determine if the man charged with the attack, Umar Farouk Abdulmutallab, acted alone or in concert with others.

VOA: standard.2009.12.27

The untimely deaths last month of Luis Eduardo Magalhaes, the government's key man in the legislature, and of Sergio Motta, one of its main political strategists, made it even harder to move ahead.

ECONOMIST: Brazil

Key players, I'm told, were the Telegraph's Lord Black who is the key fix-it man for the industry, Associated Newspapers' Peter Wright, who is the former editor of the Mail on Sunday, the editor of the Times John Witherow and the editor of the FT Lionel Barber.

BBC: How the leaders reached Leveson deal

The New Zealand international has already proved a key man in the play-off wins over Warrington and Huddersfield.

BBC: Saints' Mick Potter keen to exit with Grand Final win