Then, when snow or rain wash them onto an ice floe, they darken its surface and thus cause it to melt faster.

随后，雪或雨水将他们冲刷到冰面上，冰的表面会变黑，因而融化的也更快。

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The Third Step (Acid Wash) is to remove free iron, metallic residues, oxides, and other corrosion products from the surface of the metal.

第三步(酸洗)：去除金属表面的自由离子、金属残渣、氧化物和其他腐蚀产物。

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Wash the wafers with mixed acid, lotion and UPW (ultra pure water) by ultrasonic cleaning in wet sinks to get a clean and dry surface of wafers.

用混合酸、清洗剂和纯水在清洗槽或超声波清洗机内清洗硅片，使其表面洁净并烘干。

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First, after touching a surface that could be contaminated, wash your hands thoroughly.

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With the sun setting, the sky is etched with a calligraphy of pink clouds, their reflection a soft wash on the river surface.

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Then, when snow or rain wash them onto an ice floe, they darken its surface and thus cause it to melt faster.

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