Double rim意思

"Double rim" is a term used in basketball to describe a type of basketball hoop or basket. A double rim refers to a basketball hoop that has a second, outer rim that is slightly higher than the regulation rim. This second rim is typically used to prevent the ball from bouncing out of the court after a missed shot, and to make it easier for players to practice their rebounding skills. Double rims are commonly found in outdoor courts and some indoor courts, and are often used in street basketball and other informal games.