专题 数词知识要点必备：基数词构成中的玄机数字基数词形式举例1--12独立词Onetwothreefour ten eleven twelve13--19个位数teen(131518稍有变化)three-thirteenfive-fifteenfour-fourteen整十数个位数ty(2030405080稍有变化)two-twentythre
