以下是一些勉勵同學的格言的英文：
1. “Success is not final, failure is not fatal: It is the courage to continue that counts.” - Winston Churchill
2. “Don't give up when you're close to success.” - Anonymous
3. “Persistence pays off. Keep going and you'll reach your goals.” - Unknown
4. “Believe in yourself and you can achieve anything.” - Will Smith
5. “Opportunities are often disguised as hard work and challenges are often disguised as opportunities.” - Unknown
6. “The harder you work, the luckier you get.” - Ralph Waldo Emerson
7. “Never give up, never surrender.” - Winston Churchill
8. “Life is a journey, not a destination. Embrace the journey and make the most of it.” - Unknown
這些格言可以幫助你鼓勵你的同學面對挑戰，保持積極的態度，並繼續努力追求他們的目標。