泥岩和砂岩、灰岩等软硬岩石之间的差异风化孕发了陡崖底部的岩腔，内部泥岩的应力风化加速了岩腔发育。
Different weathering velocities for sandstone, carbonite and mudstone triggered rock cells in mudstone below cliffs, weathering in stress status sped up the development of rock cells.
黑色岩层是一种分布广泛且较为特殊的一类岩石，它的风化往往会加速各类岩石以及工程建筑物材料的风化与劣化过程。
As a special kind of rocks, black strata are distributed widely. Their weathering usually accelerates weathering process of each kind of rocks and engineering structure materials.
周日的报道引用了中国长城学会去年的调查，说一部分长城风化掉了，还有的城墙里植物的疯长加速了损毁。
Some of the construction weathered away, while plants growing in the walls have accelerated the decay, said the report Sunday, citing a survey last year by the Great wall of China Society.
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