Five-star hotels can provide first-rate service, making passengers feel at home.

五星级酒店可以提供一流的服务，让旅客有宾至如归的感觉。

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And so we can use the spin rate, the rotation rate of a star, as a clock to measure its age.

因此，我们可以用星星的自转速度及速率作为衡量它们年龄的计时器。

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NGC 6946 is bright in infrared light and rich in gas and dust, exhibiting a furious rate of star formation.

这个星系在红外线区域很明亮，富含气体和尘埃，这些都显示出恒星正以飞快的速度形成。

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The Michelin Guide uses its star ranking system to rate restaurants.

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But the companies defend their narrowing of options by saying that if they included thousands of hotels, users would have tough time searching the entire inventory by rate, star rating and location on a tiny smartphone or tablet screen.

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These exclusive hotels and resorts nabbed a Five-Star award for every category we rate: hotel, restaurant and spa.

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