Utilizing the stretch and fold mechanism, an invertible map set based image encryption algorithm is proposed.

利用拉伸和折叠的原理，提出了一种可逆映射集合的图像加密算法。

youdao

The ones you select get compiled into a handy guide, with all your destinations plotted on a map that you can fold up and put in your pocket while you sightsee.

你可以根据行程把各种信息汇编成口袋指南，附带标注所有地点的地图。这样在观光时，就能把指南装进随身口袋。

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Without late tectonic deformation, the features of recumbent fold on the geological map would be the same as those of horizontal strata.

平卧褶皱若未经后来构造变动，其图面特征与水平地层区完全一样，除了褶皱转折端以外，只是一系列平行等高线的地质界线。

youdao

First, before departure, I gathered a collection of guide books from Lonely Planet and a large fold out map of each city.

FORBES: Looking at the Web from a World Away

Not just a regular handset, but one that could fold out into an electronic map or fit around the wrist like a watch, losing none of its functionality along the way.

FORBES: Magazine Article

Children of the current generation will be poorer for it if they never get to linger over a vast paper map and then try in vain to fold it back into its original shape.

WSJ: Lost in Our Maps: A History of Cartographic Catastrophes