1·Time flies when you're having fun.
当你开心的时候，时光飞逝。
—— 《柯林斯英汉双解大词典》
2·How time flies! I've got to go now.
时间过得真快！现在我得走了。
—— 《牛津词典》
3·Time is fleeting.; Time flies.
时光飞逝。
—— 《新英汉大辞典》
4·I realize how fast time flies.
我意识到时间过得真快。
5·When I look at this picture of myself, I realize how fast time flies.
当我看着这张自己的照片时，我意识到时间过得真快。
6·Time flies! It won't be long before we say goodbye to our beloved school!
时间过得真快啊！不久我们就要和我们心爱的学校说再见了！
7·Ah me, how time flies!
啊，天啊，时间过得真快啊！
8·Oh, how time flies!
啊，时间过得真快啊！
10·How time flies!
时间过得真快！
1·Time flies, time change, regardless of any time, space, love your heart forever.
光阴似箭，时光变迁，无论任何时间、空间，爱你的心永远不变。
2·Time flies, we should study hard.
光阴似箭，我们得努力学习。
3·The bad news is time flies.
坏消息是光阴似箭。
4·Time flies; we're already at the year's end.
光阴似箭，已经到了年底了。
5·Time flies, I fear to seize this fleeting time, so that years to shape my beautiful soul.
光阴似箭，我惟恐抓不住这飞逝的时光，让岁月来塑造我美好的心灵。