What's more, experts say bug spray and other lagging products shouldn't expect a rebound anytime soon. The back-to-basics movement is here to stay.

另外，专家分析，灭虫喷雾和绝缘性材料不要期待短期内能有反弹，反噗归真的情况在这儿摆着呢！

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The hard shell course on soft clay foundation has such characters as stress distribution, back berm, lagging behind of settlement and closed action.

天然双层软土地基上的硬壳层具有应力扩散、反压护道、沉降滞后和封闭作用等特征。

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