不辜负美好时光的英文唯美短句包括：

1. "Seize the day, for time is fleeting and precious."

2. "Live each moment to the fullest, cherishing the beauty of the present."

3. "Don't let the days pass by in vain； make every second count."

4. "Cherish the present, for it is the only moment we have."

5. "Time is a treasure, don't waste it on trivial things."

这些句子都表达了珍惜和充分利用每一刻的美好时光的意思，希望能激励你更好地享受生活。