thirty-first

英['θɜːtiːf'ɜːst] 美['θɜːtiːf'ɜːst]
  • num.第三十一
  • thirty num.三十
  • weight n.重量;体重;重任;重要vt.使...负重;使倾斜
Adjective:
  1. coming next after the thirtieth in position