The prime ways to hold your skin in good condition is sufficient sleep.

充足的睡眠是保养肌肤的最好窍门。

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Yet that is a necessary but not sufficient condition for its success.

然而，对于它的成功来说，这是一个必要条件，但不是充分条件。

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The IMF suggests that a sufficient (although not necessary) condition for a global recession is any year in which world GDP per head declines.

IMF认为世界年度人均GDP下降是全球经济衰退的一个充分条件（而不是必要条件）。

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And it is only the creation of the sovereign for Hobbes, endowed or possessed with absolute power, that is sufficient to put an end to the condition of perpetual uncertainty, anxiety and unrest that is the case of the natural condition.

对霍布斯而言,只有给君主，赋予绝对的权力，人们才足以结束,对这漫长的未知的恐惧，和对不安生活状态的疑虑,这才是现有条件下我们该做的。

耶鲁公开课 - 政治哲学导论课程节选

The sufficient condition is an open market frontier, genuine entrepreneurship, the right cocktail of markets and government, and a new business mindset all of which China seems to lack at this point.

FORBES: Why China Cannot Lead The Global Economy

But although a warm sea is a necessary condition for a hurricane, it is not a sufficient one.

ECONOMIST: Eye on the storm | The

But it is a sufficient condition: it happening will lead to a contracting economy.

FORBES: Eurozone: Sovereign Debt Becomes a Credit Crunch