thirteen [θɜː'tɪːn] 十三 fourteen [fɔː'tɪːn] 十四 fifteen [fɪf'tɪːn]十五 sixteen [sɪks'tɪːn]十六 seventeen ['sevntɪːn]十七 eighteen [eɪ'tiːn]十八 nineteen[ naɪn'tɪːn]十九