mum's the word片语KK [mʌmz ðə wɝd] /mʌmz ðə wɝd/发音片语1保密、别说出去、噤声口语We're throwing her a surprise party, so mum's the word.我们要为她办一场惊喜派对,所以千万别说出去。用这个字练口说→