1. But then Sam lets go of the swing. He flies into the air and lands face down in the dirt.
    但就在此时，山姆从秋千上飞了出去，脸朝下摔在地上。

2. The moth flies mainly at night.
    飞蛾大都在晚上飞.

3. There are myriad flies in the sky.
    天空中有无数的苍蝇.

4. How time flies!
    时间过得真快!

5. But belongs to the air, travelling it may be six thousand miles to and from its northern nesting home, feeding its flown young as it flies,
    在空中十分自如，可以飞行6，000英里，可以飞往北方做窝的老家，再从老家飞回；一边飞一边喂养会飞的雏燕，甚至在顶风时也能在气流中滑翔，似乎气流在帮它前进。这些鸟对我们是有益的，

6. It ´flies´, therefore, but it cannot fly higher----its action depends on the surface, water or ground, over which it rides.
    这样，船就能飞了，但飞不高。它的飞行限决于它所悬浮的水面或地面。