Gives the rule of signs arrange of signs dynamics of periodic orbital on one dimension single valley image, and discusses the model of the forced Brussels vibrator.

本文给出了一维单谷映象周期轨道的符号动力学的符号排序规则，并对强迫布鲁塞尔振子模型作了讨论。

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In the 1990s Europe appeared to have beaten even Silicon Valley in mobile technology. European telecoms firms had settled on a single standard for mobile phones.

1990年起的10年间，欧洲在移动手机技术方面超越了硅谷，欧洲电信公司对于手机已经形成的单一标准。

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When they reached the Valley of Eshcol, they cut off a branch bearing a single cluster of grapes. Two of them carried it on a pole between them, along with some pomegranates and figs.

他们到了以实各谷，从那里砍了葡萄树的一枝，上头有一挂葡萄，两个人用杠抬着，又带了些石榴和无花果来。

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The Wadi is not a single valley (as the Arabic word suggests) but rather a vast area of protected desert in which the Bedouin have established numerous government-approved camps.

CNN: Red desert to Red Sea: Jordan from a camel's back

The villages we'd be stopping in would all be 7 to 10 miles apart on a path that follows a steady gradient up a single valley, a positively leisurely prospect compared with the up-and-down slogs from one valley to the next that characterize many Himalayan trails.

WSJ: Trekking the Har Ki Doon Trail in India's Himalayas

Why does it take agencies months to work out a single campaign, when it seems Silicon Valley can kickstart an entirely new company in the same amount of time?

FORBES: Google Says It's Time For Agencies To Get Agile