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詞根pto來自希臘的pto意為to fall。同義詞根有來自拉丁語的cid/cad/cas和laps。
symptomatic adj.征候的;(有)癥狀的(一起掉下業(yè)的sym<syn(together) + pto (=fall))
symptom n.癥狀;征候
Severe chest pain can be symptomatic of a heart attack or just simple indigestion.嚴(yán)重的胸痛可能是心臟病發(fā)作的征兆,也有可能只是單純的消化不良。