单词	corrugation
释义	corrugatedcorrugated /ˈkɔrəˌgeɪt̮ɪd, ˈkɑr-/ adjective Etymology ETYMOLOGYcorrugated Origin: 1600-1700 Latin, past participle of corrugare, from com- ( ➔ COM-) + ruga line in a surface, wrinkle Collocations COLLOCATIONS► corrugated metal  The shed is made of corrugated metal. shaped in rows of folds that look like waves, or made like this in order to give something strength:  The shed is made of corrugated metal.—corrugation /ˌkɔrəˈgeɪʃən/ noun [countable]
随便看	retrovirus retry retsina return returnable return address return ticket retweet Reuben Reuben sandwich reunification reunify reunion reunite reusable reuse Rev. rev revaluation revalue revamp revamping revanchism reveal revealed religion

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