Cách sử dụng
"Longitudinal" is a word used to describe something that happens or is measured over a long period of time. For example, a "longitudinal study" is one where researchers follow a group of people for many years to see how their health or behavior changes over time. It can also be used to describe something that goes from one end of something to another, like a "longitudinal line" running down the middle of a football field. So, if you hear or see the word "longitudinal," it usually means something that happens over a long time or stretches across something from end to end.