The backing comprises a first surface and a second surface.

所述背衬包括第一表面和第二表面。

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The injection nozzle assembly includes a cap member having a first surface that extends to a second surface.

喷嘴组件包括具有延伸到第二表面的第一表面的帽状部件。

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At least one aperture extends through the substrate from the first surface to the second surface, and has a first open area.

至少一个孔口从所述第一表面至所述第二表面延伸通过所述基底，并具有第一开口区域。

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Drop a second device on Surface and the system will offer up point-by-point comparisons of the two phones.

FORBES: Surface Surfaces At AT&T

In theory, to unscramble the signal completely you need two things: good computers and, not so easy, a second infinitely large surface, this time covered with radio telescopes.

ECONOMIST: Pulsars: In a wink | The

Further alterations were later made, including changes to the mill's second waterwheel to drive a surface water pump and haul trucks from a neighbouring gypsum mine.

BBC: Cumbria's Acorn Bank Mill grinds first flour for 70 years