fifteenth
ordinal number uk/ˌfɪfˈtiːnθ/ us/ˌfɪfˈtiːnθ/
第十五（的）
15th written as a word
Today is the fifteenth (of June). 今天是（6月）15日。
fifteenth
noun [ C ] uk/ˌfɪfˈtiːnθ/ us/ˌfɪfˈtiːnθ/
十五分之一
one of 15 equal parts of something