现在位于南旧金山新创公司LS9的研究者命名了负责产生烷类的基因和酶，这种烷类燃料的主要成分是柴油。

Now researchers at the startup LS9, based in South San Francisco, CA, have described the genes and enzymes responsible for this production of alkanes, the major components of fuels such as diesel.

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自从 南希 · 佩洛西搬家到旧金山后，一直在努力找房，几个月来，她带着四个年幼的孩子一直寄住在婆母家。

WHEN Nancy Pelosi moved to San Francisco, she struggled to find somewhere to live. For months, and with four small children, she lodged with her mother-in-law.

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这便是可能成为伯南克新副手的、旧金山联邦储备银行行长珍妮特•耶伦（Janet Yellen）。

That was Janet Yellen, president of the San Francisco Fed, who is likely to be Mr Bernanke’s new vice-chairman.

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