单词	rockfall
释义	rock·fall (rŏkfôl′) n. A fall of rocks, as from a cliff.
随便看	permeate permeation permeative permethrin Permian per mil per mill permineralization permineralize permissibility permissible permissibleness permissibly permission permissive permissively permissiveness permit permit permittee permitter permittivity permutability permutable permutably

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