lips are sealed 同义词

1 闭口不言

dumb

2 保密

close private undisclosed untold hush-hush

3 守口如瓶

close secret discreet closemouthed tight-mouthed close-lipped

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depth of field depend on/upon deer tick delinquently delving deke deifying deliver over to DeMoivre's theorem descend from delight in democratic socialism Delhi belly Denver omelet dependent variable deep in debt deficit spending defaming demilitarized zone delivery room defer to (something) deny oneself definite integral delaying tactic demand-side desanctify definitive host deep-dish dent corn delay tactic