A coat of primer should be made over the bare surface before the main painting.

在喷涂主漆前，应在物品的表面刷一层底漆。

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Taking bare surface as CK, this paper discussed effect of straw-mulch during wheat stage on soil water dynamic changes and yield of summer maize.

以不覆盖的处理为对照，研究了冬小麦期覆盖秸秆对夏玉米土壤水分动态变化及产量的影响。

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The new study focused on surface melt, runoff and the number of days when bare ice, free of snow, is exposed to the Sun's radiative force.

这项新研究的重点是表面融化，径流以及暴露于太阳辐射下的裸冰和无雪天数。

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He claimed it left the playing surface bare in the week of the game, disrupting training plans.

BBC: Stadium owners admit shortcomings

The Wales boss was angered before last month's opening World Cup game against Azerbaijan as the removal of the portable pitch for a Madonna concert at the stadium left the playing surface bare in the week of the game, disrupting his training plans.

BBC: Bellamy bemoans Millennium pitch

Other culprits include the application of fertilizer in the fall, when the ground is bare, and the spreading of manure on the surface, instead of into the soil.

WSJ: Report predicts ever-bigger Lake Erie algae blooms