这是个美国人关于棒球的常用语.当一个人把棒球打出球区时,就是一个全垒打.所以这句话的意思是你做得太棒了,和后面的Incredible是一个意思.
It's an American English expression from baseball.If one hits the ball out of the ballpark its a home run and the team gets 1 to 4 runs (points) depending on whether there are men on base.In short it means you did a great job.
不明白的再问哟,望及时采纳,多谢!