Pulsar, the world's first electronic digital watch, created a sensation when it was unveiled in New York in 1972 and it changed the world's perception of time.

脉冲星，是世界上第一台电子数字手表，引起了巨大轰动时，在纽约首次亮相于1972年，它改变了世界的时间观念。

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E-commerce will enable Digital Li Ning to shape American consumers' perception of the brand throughout the entire buying process.

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For Republicans, grassroots digital moments like these may help them fight the perception they are out of touch with the American people, a view held by 62% of the public according to Pew.

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And if I did want the whole album, the expectation of the production savings (no liner notes to print, no plastic case, no shipping) creates an expectation that I will pay less for that, a perception that has driven down the price of CDs to compete with digital albums.

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