A regressive tax, like the poll tax, takes proportionately more of a poor person’s income.

像人头税一样，递减税占穷人收入比例更大。

The regressive valvulopathy was misdiagnosed easy as rheumatic heat disease,regressive valvulopathy infectious,endocarditis dysfunction and rupture of papillary muscle ect.

老年人退行性心瓣膜病多易误诊为风湿性、先天心、感染性心内膜炎、乳头肌功能不全等疾病。