31的英語怎么寫31th31thirty-one2，二十一到三十一的英文請(qǐng)速告知twenty-one,twenty-two,twenty-three,twenty-four,twenty-five,twenty-six,twenty-seven,twenty-eight,twenty-nine,thirty,thirty-one3，請(qǐng)問21到31的英語單詞是什么21.twenty-one22.twenty-two以此類推到thirty30thirty-one31就是序數(shù)詞！first、second、t...