Cách sử dụng
"Ninetieth" is a term that we use to talk about something that is in the 90th position or happening in the 90th turn. For example, if you are in a line of 100 people, and you want to know how many people are in front of you, you would say, "I am in the ninetieth position." Or, if you want to talk about the ninetieth day of the year, you would say, "Today is the ninetieth day of the year." Basically, "ninetieth" is used to describe something that is in the 90th place or happening in the 90th instance.