in layman's terms
B2CEFR level
45/100Rarity: uncommon
TechnicalRegister
Using plain, non-technical language that a person without medical training can readily understand.
In layman's terms, the valve isn't closing properly, so a little blood leaks back with each heartbeat.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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