Decadal and longer changes in sunspot activity impacting warming and cooling cloud cover patterns are now being recognized as an important factor.

太阳黑子活动的年代际和长期变化对升温和降温云层模式的影响现在已被确认为一个重要因素。

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The vegetation cover and management factor ( C ) in the universal soil loss equation (USLE) is an index to evaluate this effect, which has been studied deeply and used widely.

通用土壤流失方程（USLE）中的植被覆盖与田间管理因子（C）是评价这种抑制作用的有效指标，并被广泛采用和深入研究。

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The result shows that cover thickness is the key factor which determines the durability of industrial concrete mill buildings.

结果表明，混凝土保护层厚度是决定混凝土工业厂房耐久性至关重要的因素。

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It can cover that if airfares and its load factor--industry jargon for the percentage of seats filled--return to pre-Sept. 11 levels.

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Um thinks that the reduced estimate mostly reflects lower demand for cover glass from non-iPad tablets, but with Apple a lesser factor.

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