Cách sử dụng
"At long last" means finally after a long time or after waiting for a long time. It is often used to express relief or excitement that something has finally happened. For example, "I have been waiting for this day at long last!", "The show is starting at long last", "The construction of the new building is finished at long last". So, you can use this expression when you are happy that something you have been waiting for a long time has finally happened.