严重的,一般我只用Serious, 表示最高级,就是the most serious 翻译你举例的这句话就是,Between the light polution and the earth polution, I think the earth polution is more serious. 你这句只有二个比较,所以用不到最高级,最高级是要三个以上比较才可以用到,这里只能用比较级。如果你想表达土地污染是最严重的污染之一,可以这么说,Nowadays I think the earth polution is one of the most serious pulutions.