It is capable of sensing its surroundings, and does not simply try to adhere to a pre-planned route, so it is not upset if furniture is moved, or if it is picked up and taken to clean another room.

能够感应它周围的环境，并不是简单地只按照设计好的线路走，所以，即使家具的位置发生了改变也难不倒它，你还可以把它拿起来，去清洁另一个房间。

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This being brought into contact, daily, with facts, will upset a great many fancies, and give a pre-eminence of the factual over the imaginative.

每天接触到各种事实，这会搅乱许多设想，让事实超越了想象。

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Huffington, the founder of the Huffington Post website, is the latest air traveler to face the ire of another passenger upset by pre-takeoff phone use.

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Jazz bassist Esperanza Spalding upset boy wonder Justin Bieber for Best New Artist (according to pre-ceremony Vegas odds, Spalding was the longest shot to win).

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In 2011, he grew upset after President Barack Obama called for Israel to return to its pre-1967 borders, with land swaps, as the basis of a Mideast peace deal.

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