The upper-layer purpose design and the under-layer action command of the robots are completely divided to enhance the flexibility of the robot and the consistence of the decision-making system.

将上层协作意图设定和下层机器人的动作指令完全分开，增强了机器人运动的灵活性和决策系统的连贯性。

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Geologists think that this fluidized ejecta crater indicates that a layer of permafrost, or water ice, lies just a few meters under the surface.

地质学家认为，这个具有流体化喷出物的陨石坑表明，在地表下几米深处有一层永久冻土层或水冰。

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The answer may be that virtually all the water on Mars is now locked in the permafrost layer under the surface, with more contained in the planet's polar caps.

答案可能是，现在火星上几乎所有的水都被锁在地表下的永久冻土层中，更多的水被包含在这个星球的极地冰帽中。

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Methane is the principal component of natural gas, and massive amounts of it are trapped in reservoirs beneath the sea floor and under a layer of the ice-like substance.

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Both models also sport dual-layer backlit keyboards, with a snazzy red tone peeking out from under the black chiclet-style keys.

ENGADGET: Lenovo expands IdeaPad lineup with Y400, Y500, Z400 and Z500: prices start at $549

The Super Multi-Layer Coating reduces flare and ghosting, ensuring sharp, high contrast image quality even under severe conditions such as taking photos against or towards the sun.

ENGADGET: Sigma DP3 Merrill packs a Foveon X3 sensor and a fixed F2.8, 75mm-equivalent lens