"birch beer" 的定义和意义

What is "birch beer"?

Birch beer is a type of carbonated soft drink that is flavored with extracts from birch bark or twigs. It has a sweet and slightly minty taste, with a distinct birch flavor that sets it apart from other types of soda. Birch beer comes in both alcoholic and non-alcoholic varieties, with the non-alcoholic version being more commonly consumed. The drink is popular in the northeastern United States, particularly in Pennsylvania, where it is often served at fairs and carnivals. Birch beer is also a popular mixer for cocktails, and can be found in a variety of flavors, including traditional, red, and black.