A volume phase and off-axis holographic Fresnel lenses was developed for matching the corresponding solar cells with different band gaps. The conversion efficiency of energy increased by two times.

用激光制作了离轴体积位相全息菲涅耳透镜，并把它们和相应的具有不同能带隙的太阳电池匹配，其能量转换效率提高了两倍。

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The data traffic created by these two handhelds has increased 19 times from September 2008 to this past month and now accounts for 43% of all smartphone requests worldwide.

这两款手机的数据查询量从08年9月份以来增长了19倍，占所有智能手机数据查询量的43%。

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Since Brazil relaxed price and production controls on sugar cane two decades ago, its crop has increased by two and a half times.

自二十年前巴西放松对甘蔗价格和生产方面的控制以来，甘蔗产量增长了2.5倍。

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Since Brazil relaxed price and production controls on sugar cane two decades ago, its crop has increased by two and a half times.

ECONOMIST: Energy in Brazil

The CPSC estimates that exposure to children from furniture increased cancer risk by 20 additional cancers per million (two times the California safety standard of 10 cases per million).

FORBES: Target, Walmart, Babies-R-Us Sued Over Toxic Baby Products

In the past, says Drewry Shipping Consultants, the container trade has increased by between two-and-a-half and three times the rate of GDP growth.

ECONOMIST: On a roll