crumple something up
phrasal verb with crumple verb uk/ˈkrʌm.pəl/ us/ˈkrʌm.pəl/
把…揉皱；把…揉成一团
to crush a piece of paper until all of it is folded
Sylvie crumpled up the letter and threw it in the bin. 西尔维把信揉成一团扔进了垃圾箱。
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