Here's the answer:
“이 치료는 즉시 효과가 있어요”
Watch a real native speaker say it:
Here's how it sounds in a textbook:
Fun fact: the hundreds of thousands of people learning Korean with Memrise get this phrase correct 91.71% of the time!
Fun fact: the hundreds of thousands of people learning Korean with Memrise get this phrase correct 91.71% of the time!