He has served a number of double faults in this set.

他在这盘发球出现了一些双误。

《牛津词典》

One relative bright spot for Macy's during the holiday season was the online channel, where it rang up "double-digit" increases in sales and a 25% increase in the number of orders it filled.

梅西百货在假日季的一个相对亮点是：其在线渠道的销售额实现了“两位数”的增长，完成的订单数量也增加了25%。

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That's double the number a decade ago.

这个人口数量已经是10年前的两倍。

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Nearly a quarter (22%) of adults now own some kind of tablet computer, double the number a year ago (11%), and smartphone ownership is up nine points, from 35% to 44%.

ENGADGET: Pew Research finds 22 percent of adults in US own tablets, low-cost Android on the rise

Our global market share has now reached double-digits and we have attained a double-digit share in a greater number of our strategic markets.

ENGADGET: Lenovo nearly doubles net profits in Q1 earnings report, not so certain about 'mainstream' Ultrabooks by end of year

Nearly one-third of buyers in Singapore in 2011 were foreigners, more than double the number seen a decade before.

WSJ: The Price of Global High-End Living