一、友情永恒类

1. "Our last summer was called parting, but our friendship is eternal."（我们最后的夏天被称为离别，但友情永存。）

2. "In the grand tapestry of life, our bond is a thread of unbreakable loyalty."（在生命的长卷中，我们的情谊是坚不可摧的忠诚。）

3. "A friend is a second self； some are closer than family."（朋友如第二自我，有时比亲人更亲。）

二、未来祝福类

1. "Study hard for more than three years； your senior can live a pig, and we'll laugh at the end."（再苦读三年，等你毕业时我们可以开怀大笑。）

2. "May your future be as bright as the dreams we've nurtured together."（愿你的未来比我们共同培育的梦想更耀眼。）

3. "Wishing you a journey filled with success, joy, and the realization of your dreams."（愿你的人生旅途充满成功、欢乐与梦想成真。）

三、时光感慨类

1. "Time flies, years pass, but our friendship remains forever in my heart."（时光飞逝，岁月如流，唯有友情永存心间。）

2. "Every parting is a prelude to reunion, every farewell a promise of future meet-ups."（每次离别都是重逢的前奏，每个告别都承载未来相见的承诺。）

3. "As we bid adieu, let's carry forward the memories we've created, not just the moments, but the essence."（分别时，让我们铭记我们共同创造的经历，而非仅是瞬间，而是永恒。）

这些赠言可根据具体场景选择搭配，既表达深情厚谊，又蕴含对未来的美好期许。建议搭配贺卡或视频使用时更能传递温暖。