三楼

tā de bàn gōng shì zài sān lóu

他的办公室在三楼。

His office is on the third floor.

nà ge fàn zuì xián yí rén cóng sān lóu de chuāng kǒu tiào le chū qù

那个犯罪嫌疑人从三楼的窗口跳了出去。

The suspect took a leap out of a third-storey window.

wǒ men de jiào shì zài èr lóu tā men de zài sān lóu

我们的教室在二楼，他们的在三楼。

Our classroom is on the second floor, and theirs is on the third floor.