They stacked rocks with center holes (tube or doughnut shaped) from the surface to the deep stone layer as a guide for their drills (similar to today's guide tubes).

管状或中空管状的中心孔从地表到深石岩石层放满石头，以作为铁转的探头，作用类似今天的导管。

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These polymers cover the surface of the material, and guide electric signals throughout the full display to create high resolution images.

这些聚合物覆盖在材料表面，引导电信号在整个显示屏进行传输，从而产生高分辨率图像。

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Create a blend line in the midpoint to guide the surface creation.

创建一个混合线的中点，以指导建立的表面。

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Best of all, rbAPPmit is available for download as well speak in the source link below, but we'd probably wait for the (presumably thick) user guide to surface before diving in headfirst.

ENGADGET: MIT app turns your Android phone into a supercomputer... of sorts

These maps will in turn guide partners in determining where to drill boreholes to bring the water to the surface in a cost effective manner.

UNESCO: Combating drought in the Horn of Africa