词汇	collapse doline
释义	collapse doline 塌陷漏斗
随便看	permutation transformation permutation tree permutation without repetition permutation with positive order permutation with repetition permutative permutative equational theory permutatively permutativity permutator permutators permutatory permutatus permutational permutational isomer permutationally permutation ambiguity permutation and combination permutation and combination multiplication rule permutation and combinations permutation-based representation permutation box permutation cipher permutation code permutation code algorithm