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decrescendo adj.,adv.〔意大利語〕 【音樂】漸弱。n.漸弱音...

decrescent

Ejection murmurs begin after s1 and are usually crescendo - decrescendo ( “ diamond - shaped ' ) , ending before s2 噴射音始于s1后,通常有漸強-漸弱特征,并于s2前結束。