Cách sử dụng
The word 'stair' is used to refer to a series of steps that go from one level to another in a building. It is often used when talking about climbing up or descending down a set of steps. For example, "I climbed the stairs to my apartment" or "I tripped on the sixth stair." This word can be used in various contexts, such as in houses, offices, schools, and other buildings.