离职时可能会感到伤感，以下是一些表达这种情感的英文句子：
1. "Goodbye, but not forever."（再见，但并非永别。）这句话意味着尽管分开，但彼此的连接不会断掉，是一种充满希望的告别方式。即使物理距离拉长，心灵依然紧密相连。
2. "The road ahead is long, but let's keep in touch."（前路漫长，但让我们保持联系。）这句表达的是对未来的祝福，同时强调保持联系的重要性，让离别者感受到温暖的关怀。
3. "May the road rise up to meet you, and the wind be at your back."（愿道路升腾迎接你，风儿吹拂你的背。）希望每一个前行的路途都顺利，风都会给予力量，这是对离别者最好的祝愿。
4. After two and a half years at xxx, it's time for me to say goodbye and move on to my next challenge. It has been an interesting adventure and as I am sad to leave, I am also excited that everything I have learnt during this time will help to shape the rest of my career. （在xxx待了两年半，是时候说再见，迎接下一个挑战了。这是一段有趣的冒险，虽然离开让我伤心，但我也很兴奋，因为这段时间所学到的知识将塑造我的职业生涯的其余部分。）
5. Goodbye to my favorite team, colleagues and company. It has been an interesting adventure and as I am sad to leave, I am also excited that everything I have learnt during this time will help to shape the rest of my career. Being with xxx helped to improve the way I think about the xxx industry. I will continue to cherish the lasting relationships we built together. Thank you. （再见，我最喜欢的团队、同事和公司。这是一段有趣的冒险，虽然离开让我伤心，但我也很兴奋，因为这段时间所学到的知识将塑造我的职业生涯的其余部分。与xxx共事帮助我改善了思考xxx行业的方式。我会继续珍惜我们共同建立的持久关系。谢谢。）
这些句子可以帮助你表达离职时的复杂情感，无论是悲伤、感激还是对未来的期待。选择合适的句子，可以根据你与同事和公司的关系以及你离职的具体情况来表达。