The "lub-dup" sound is your heartbeat.

“扑通”的声音是你的心跳。

Listen for the "lub-dub" sounds as the valves within the heart snap shut.

听听心脏在瓣膜突然关闭时产生的“lub - dub”声。

The sound-amplifying 3M Littmann Electronic Stethoscope 3200 listens to a patient’s heartbeat—lub-DUB, lub-DUB—and beams the beats to Cardioscan software that detects abnormalities.

这款3M Littmann电子听诊器3200放大患者的心跳声-扑通、扑通——并传输心跳数据到监测心脏异常的心扫描软件中。