Google 來的:
An avenue is a street that is borded by trees
The spelling is also a huge difference.
Historically, an avenue was a road that led to a particular building, while a street was any roadway in a city. In some cities, such as New York, streets running one direction (such as north-south) are called avenues while streets running the other direction are known as streets. In other cities, such as Chicago, there is no distinction between streets and avenues.
The true definition of avenue is that it has trees or shrubs along each side. even though a lot of streets also have this.