Frost action and permafrost effects under different geological conditions are considered.
文中探讨了不同地质条件下的冻融作用及多年冻结效应。
Other design considerations include frost effects, limited availability of granular and rockfill materials, short construction period, and spill containment.
其他设计考虑包括冻结效应、有限的粗粒和堆石料、短施工时间和燃料溢出保护。
Early and late frost, Dedrolimus superans, sawfly and needle cast of larch could reduce the quality and quantity of foods of larch casebearer and had indirect effects on its population density.
早霜、晚霜、松毛虫、叶蜂及落叶松早期落叶病等都能直接影响鞘蛾食物的质量和数量，进而间接地使鞘蛾种群密度降低。
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