In the United Kingdom alone, there are around 650 kilometers of "smart roads" in use.

仅在英国，就有大约650公里的“智能公路”在使用。

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And retailers are smart to show the original price alongside the sale price than show the sale price alone.

零售商也很聪明：他们把原始价格挨着销售价格标示，而不是仅仅标示销售价格。

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Keeping an emergency contact in your cell phone or wallet is always a smart idea, especially when traveling alone, Rose said.

在手机或者钱包中留一个紧急联系人的联系方式绝对是个明智之举，特别是当你独自旅行时，罗斯说。

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Wenger was fortunate to inherit a solid defense in 1996 and he was smart enough to leave it well alone.

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Miss Horwood-Smart also detailed how Martin lived alone with his Rottweiler dogs.

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So why do so many smart people still try to go it alone?

FORBES: Why Smart People Can Be Stupid About Asking For Help