The base surface should not be dew.

基面外观不应结露。

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Each of these surfaces derives from a base surface type, cairo_surface_t.

这些外表类型都派生自外表基类型cairo_surface_t。

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The linear equivalent normal stresses of the base surface can be easily calculated by the formulas of material mechanics.

根据材料力学公式可以计算建基面上任意点的线性化等效正应力。

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NASA, for example, recently announced plans to return by 2020, eventually building a permanent base on the lunar surface.

CNN: Who owns the moon? It's 'complicated,' say experts

The surface is super slick (AKA super fingerprint friendly), though the base of the laptop utilizes a soft-touch, non-slip surface that's nice to handle.

ENGADGET: MacBook goes unibody, available today

Base jumping sees participants launch themselves from a surface and free fall from high altitudes before opening a parachute.

BBC: Mother's grief at base jump death of Gary Harbird