1. rational expression：rational exploitation 合理开采 | rational expression 有理式 | rational number 有理数
2. rational form：rationalexpressionwithrealcoefficients 实系数有理式 | rationalform 有理式 | rationalformula 示构式
3. yuurishiki;rational expression：方式houshiki;form; method; system | 有理式yuurishiki;rational expression | 様式youshiki;style; form; pattern