weight-loss surgery
noun [ U or C ] medical uk/ˌweɪt.lɒs ˈsɜː.dʒər.i/ us/ˌweɪt.lɑːs ˈsɝː.dʒər.i/ (also bariatric surgery)
（通过使胃变小来达到目的的）减重手术
an operation that makes the stomach smaller so that less food can be eaten and digested
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