triple-precision number

Scanlife, a provider of QR code services, saw the number of unique users scanning codes through its system triple in the year to March.

二维码提供商Scanlife发现，截止今年三月，使用他们的系统扫描QR码用户增长了两倍之多。

The number of refugees in Syria is already passed the one million marks, but this number could double or even triple by the end of 2013 according to the U.N.'s Refugee Cheif Antonio Guterres.

联合国难民事务高级专员安东尼奥·古特雷斯表示，目前叙利亚难民人数已达100万，到2013年年底难民数量将达到目前水平的两到三倍。

Bookings for travel to the US during the National Day holiday, from Oct 1 to 7, are almost triple the number from last year, according to a report released by lvmama.com, a major online travel booking platform.

大型在线旅游预订平台驴妈妈旅游网发布的报告显示，10月1日至7日国庆假期期间赴美游的预订量同比增长近3倍。

Chinese and foreign experts say the number of smoking deaths could triple by 2030.

中国和外国专家说吸烟死亡的人数到2030年可能会翻三番。

Estimating the Number of Genes Controlling a Quantitative Trait by Triple Test Cross Design

用三向测交设计估计数量性状的基因数目