例句：
Time flies when you're having fun.
当你开心的时候，时光飞逝。
A kite flies to the blue sky.
风筝飞向蓝天。
How fast the dragonfly flies!
那只蜻蜓飞得真快啊！
The new airplane flies twice the speed of sound.
这架新飞机的飞行速度是声速的两倍。
How time flies!
时光飞逝！
Quietly she flies far and far away.
她默默地飞走了，飞得很远很远。
Cathay Pacific flies daily nonstop to Hong Kong.
国泰航空的航班每天直飞香港。
How time flies! I've got to go now.
时间过得真快！现在我得走了。