ACM中全混流反应器模块求指导? fr([1 polymer_in_product=="yes" and disablereacs == "no" and polkinetics == "free-radical" and polmethod == "equation" and openfr "")]) as freeradical2(fr:openfr); fr是个数组,后面的判断表示0或1, 如果为0则fr不存在,如果为1,则表示fr(1). 也就是说fr(1)是后面的条件都达到后的情况。查看更多