He wrapped one layer of the plastic around the card and tried again.

他在卡片上裹了一层塑料，然后又试了一次。

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You can use this by selecting one layer, or certain layers to show the properties for those layers only.

你可以选择一个图层或者某些图层，通过用这种方法，仅显示那些层的属性。

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You'd think electronic financial trading would be extra secure, but not so much: One of the most popular application-layer protocols in the financial industry leaves these money applications wide open to attack, according to researchers.

FORBES: Hacking Capitalism

Their Helicon Double Layer Thruster uses radio waves to ionise one of the inert, or noble gases - a group which includes krypton, xenon and argon.

BBC: Glow from argon plasma. Image: LPTP, Ecole Polytechnique

The FCC team found that stacking the coatings one on top of another enhanced the anti-reflective properties of each layer.

CNN: New nano coating boosts solar efficiency