严重的问题是被污染了的空气悬浮在地球表面。
The serious problem is that the polluted air is hovering over the surface of earth.
阳极表面处理，不造成二次污染。
由于煤带来的硫酸盐污染通过遮蔽阳光照射到地球表面使地球变冷。
Sulphate pollution due to coal cools the planet by shading its surface from sunshine.
被粘物表面应清洁干净、平滑、干燥、无油脂或其它污染物。
Sticking surface should be clean, smooth, dry, no fat or other pollutant.
被粘物表面应清洁干净、平滑、干燥、无油脂或其它污染物。
Sticking surface should be clean, smooth, dry, no fat or other pollutant.
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