"你必须度过一些糟糕的日子，才能迎来你人生中最美好的日子。"

Simplified Meaning:

Life can be tough sometimes, and everyone goes through difficult moments. However, these tough times are necessary because they help us appreciate the happy moments even more. Think about training for a sport—if you practice hard and push through the pain and hard work, you will eventually get better and win games. Similarly, in life, going through bad days builds your strength and character, making the good days that much sweeter. If someone wants to achieve something great, like starting a successful business or finishing school, they will face challenges and struggles along the way. By not giving up and pushing through those difficult periods, they can experience the joy and satisfaction of their achievements. So, when you're having a rough day, remember that it's part of the journey and better days are ahead.