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The "lub-dup" sound is your heartbeat.
“扑通”的声音是你的心跳。
youdao
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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。
youdao
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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。
youdao