Watch for worthwhile 20- and 50-minute eyeOpener tours offered for free too.

另外，免费的20分钟或50分钟“开眼之旅”（eyeOpener tours）也十分值得一试。

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Academics tend to regard asking whether a PhD is worthwhile as analogousto wondering whether there is too much art or culture in the world.

对于学者来说，怀疑读博士学位是否值得，就好像怀疑这个世界是否充斥了太多的艺术和文化一样多余。

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Academics tend to regard asking whether a PhD is worthwhile as analogous to wondering whether there is too much art or culture in the world.

在学术机构看来，询问博士有什么用处，就如同怀疑这个世界上艺术和文化是否太多了。

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As sufficient returns proved elusive, too much credit chased too few worthwhile ventures.

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The harbor masters were data producers with a business model that excluded many potential users because the transaction costs were too high to be worthwhile.

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Discarded cell phones too, might be a worthwhile source.

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