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。