美国宪法第十五修正案通过，赋予非裔美国男性投票权。

The Fifteenth Amendment to the U.S. Constitution passes, granting voting rights to African American men.

这是她第十五次尝试。

This is her fifteenth attempt.

他是班上的第十五名学生。

He is the fifteenth student in the class.

我们在第十五天完成了任务。

We completed the task on the fifteenth day.

他住在大楼的第十五层。

He lives on the fifteenth floor of the building.

他们在比赛中获得了第十五名。

They finished in fifteenth place in the competition.

白露是二十四节气中的第十五个节气。

White Dew is the fifteenth solar term in the twenty-four solar terms.

接着我又看了第十五集一遍。

Then I watch the fifteenth episode once.

第十五是璧迦, 第十六是音麦.

The fifteenth to Bilgah, the sixteenth to Immer.

他的生日是农历一月的第十五天。

His birthday falls on the fifteenth day of the first lunar month.