One theory which has been put forward is that many diners in San Francisco deduct part of the three or four percent that restaurants tack onto the bill for Healthy San Francisco.

有一种说法是，产生这种现象是因为很多旧金山食客会把餐厅已经提前加上去的，要交给旧金山健康法案的3%或者4%的税从小费中扣除了。

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To establish a healthy atmosphere of competition, a second nuclear weapons laboratory, Lawrence Livermore National laboratory, was established near San Francisco.

为了营造健康的竞争氛围，第二座核武实验室，劳伦斯·利弗莫尔国家实验室在旧金山附近建成。

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And most of the women that I've met over there and in the San Francisco area were very healthy people.

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Two decades later, fresh out of culinary school and working in San Francisco, I was doing healthy, produce-driven cooking with a broad range of global influences.

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"We always think we're right and always think it's possible to do them, " says Mr. Kaplan, who is now chief executive of a company based on his latest idea, The Melt, San Francisco, a high-tech restaurant chain offering healthy comfort food.

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