关于数字"seventeen"的英语文案，综合多个来源整理如下：

一、经典歌词片段

1. "Because I want to be your tomorrow, I lived my today"（《Thanks》）

2. "We live in a moment that's only once in a lifetime"（《Fallin' Flower》）

3. "We don't take you for granted because you're the one I adore"（《舞い落ちる花びら》）

二、情感共鸣类文案

1. "Even if we're miles apart, we'll shine together"（网络歌词）

2. "Our love is like a flower that never fades"（网络歌词）

3. "In the chaos of life, you're my anchor"（网络歌词）

三、生活哲理类文案

1. "Seventeen is the age of dreams and beginnings"（网络文案）

2. "The best time to plant a tree was 20 years ago. The second best time is now"（网络文案）

3. "Life is about making every moment count"（网络文案）

四、其他创意表达

1. "Seventeen is not just a number, it's a symbol of youth, freedom, and endless possibilities"（网络文案）

2. "When you're seventeen, you're not just old enough to drink, but old enough to dream"（网络文案）

3. "Seventeen is the number of stars in the sky, the rhythm of our heartbeat, and the depth of our love"（网络文案）

这些文案结合了歌曲、情感表达和生活感悟，可根据具体场景灵活选用。建议使用时注意版权问题，引用时需标注来源。