Here's the answer:
“下次吧!”
(xià-cì ba!)
Watch a real native speaker say it:
Here's how it sounds in a textbook:
Fun fact: the hundreds of thousands of people learning Chinese with Memrise get this phrase correct 88.71% of the time!
(xià-cì ba!)
Fun fact: the hundreds of thousands of people learning Chinese with Memrise get this phrase correct 88.71% of the time!