3in a heartbeatAmerican EnglishAmE very quickly, without delay 一下子
Things can change in a heartbeat.
情况会瞬间发生变化。
Examples from the Corpus
in a heartbeat• If he asked me to marry him, I'd accept in a heartbeat.• Beyond Des Jardins' cooking, there are two things that would bring me back to Jardiniere in a heartbeat.• Don't think for a minute owner Jerry Jones wouldn't trade places with Bob McNair in a heartbeat.• For exam-ple, an emergency or operating room is not the best environment for monitoringsubtlevariationsin heartbeats.
heartbeat• In addition to being the seat of consciousness and awareness, the brain controls heartbeat, breathing, and other life-support systems.• It opens rather clinically, with a sound-and-vision sequencefeaturingheartbeats, hospital interiors and instruments and a how-its-done Idiot's Guide.• She turned her hot face into the pillows and tried to get some sort of control over her heartbeats.• Put simply, cardiac arrhythmia is an irregularheartbeat.• A baby's heartbeat is nearly twice as fast as an adult's.• Within a week, the fetus's heartbeat had returned to normal.