Because no modern land animals even approach sauropod size, scientists have also lacked a living analogue to use as a guide to possible sauropod behavior.

因为现代陆地动物的体型都比不上蜥脚类动物，科学家们也缺乏一种类似的活物参考以了解蜥脚类动物可能做出的行为。

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It is still useful today to guide people's lives through special foods, cultural ceremonies and even healthy living tips.

如今，在通过特别的食物、文化仪式甚至健康生活建议来指导人们的生活方面，它仍然有用。

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They provide a guide to the thought processes of Europeans living in the 15th and 16th centuries.

他们提供了认识15和16世纪欧洲人思维过程的指南。

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SocialGuide, which received first-round funding earlier this year, tracks social conversation to act as living, breathing TV Guide.

FORBES: Social TV: What Casey Anthony And Jersey Shore Teach About A New Metric

PPPs can be a handy guide to the cost of living in countries, they may not be a reliable guide to future exchange-rate movements.

ECONOMIST: Big MacCurrencies

Mr FitzPatrick said his Responsible Parking (Scotland) Bill had the support of a number of groups, including Guide Dogs Scotland and Living Streets.

BBC: Wheelchair user