怎么回事

zen3 me5 hui2 shi4

what's the matter?, what's going on?, how could that be?, how did that come about?, what it's all about

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怎麼回事|怎么回事 [zěn me huí shì] ► what's the matter? ► what's going on? ► how could that be? ► how did that come about? ► what's it all about?