Youth is full of vitality and hope. We should have firm beliefs and the courage to forge ahead. We should gain experience through responsibility and grow through commitment. We should strive in our dreams.

Dream Youth, live up to your prime.

Be strong in youth, live up to your aspirations.

Youth is the right time； live up to it.

Passionate youth, live up to your prime.

Youth should be used to its fullest； do not waste it.

"Seize the day and live it to the fullest."

这些句子都表达了在青春时期要充满活力、积极进取、追求梦想并充分利用每一分每一秒的精神。希望这些句子能够激励你不负青春，勇往直前。