第十

第十

"Tenth."

Here, '第十' specifies the ordinal number in the context of days within a given month.

今天是九月的第十天。

Today is the tenth day of September.

In this sentence, '第十' refers to the ordinal number indicating the floor level within a building.

我住在第十层楼。

I live on the tenth floor.

Here, '第十' identifies the particular sequence of the chapter in the book.

这本书的第十章讲了自然的演化。

The tenth chapter of this book discusses the evolution of nature.