Whether the pain is related to the mitral valve prolapse or whether it is an epiphenomenon is controversial because it is common in the absence of evident prolapse. 不过,疼痛是否与二尖瓣脱垂相关,抑或只是一种偶发现象,对此人们尚有争议,因为这种疼痛即便是在无明显脱垂时也很常见。
epiphenomenon epiphenomena
[ noun ] a secondary phenomenon that is a by-product of another phenomenon <noun.phenomenon>
First, he composes a press release which accuses the Home Office of seeing the rise in crime as 'the ineluctable epiphenomenon of universal wickedness'. Then he talks about 'offenses' instead of 'offences'.