A company called Clear is operating a registered-traveller programme at a growing number of American airports.

一家名叫Clear的公司正在越来越多的美国机场运作其注册旅行者项目。

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The particular laws are as our points of view, as, to the traveller, a mountain outline varies with every step, and it has an infinite number of profiles, though absolutely but one form.

我们的特殊规律都出于我们的观点，就像从一个旅行家看来，每当他跨出一步，山峰的轮廓就要变动一步，虽然绝对的只有一个形态，却有着无其数的侧页。

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The use of a code number to access the images protects a traveller's privacy, shielding the photos from the public eye.

BBC: Expert portraits in touristy spots

The sustainable communities committee approved the number after considering the county's gypsy and traveller area assessment which evaluates pitch needs.

BBC: Beds, Herts & Bucks