Both the normal rodents and those with Alzheimer's were exposed to the electromagnetic field generated by standard mobiles use for two one-hour periods each day for seven to nine months.

研究人员在七至九个月时间里，每天两次，每次一小时，让这些正常的和患老年痴呆症的啮齿动物接触由标准手机产生的电磁场。

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The nine-hour flight duration more than triples the duration of Puma's standard battery-only operation.

9小时的持续飞行是美洲狮标准电池工作时间的3倍。

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It is the bell curve to which investors are referring when they talk about a "nine standard deviation event".

当投资者们谈及所谓“九个标准差事件”时，他们实际上在说钟形曲线。

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The stockholders of seventy-seven oil companies gave control of their stock to nine trustees of Rockefeller's Standard Oil Company.

VOA: special.2010.06.03

Another option is to squeeze in nine standard 17-inch seats.

ECONOMIST: Cabin fever

With Samsung's range of nine lenses and professional standard accessories, the NX eco-system ensures that all imaging ambitions can be realised, whatever the user's photographic speciality or interest.

ENGADGET: Samsung's NX20, NX210 and NX1000 mirrorless camera trio hands-on (video)

On the plus side, battery life seems to be very good, clocking in at almost six hours with the standard six-cell battery and about nine with an optional nice-cell model.

ENGADGET: HP's Compaq nc2400 ultraportable notebook reviewed