a flight of的用法和樣例：
例句
- A flight of steps led up to the house.
一段台階向上通到了屋前。 - The old woman fell down a flight of stairs.
那位老太太從一段樓梯上摔了下來。 - She died when she was ninety, not of old age, but from head injury when she fell down a flight of stairs.
她90歲時去逝，並不是老死，而是從樓梯上摔下來頭部受傷而死。 - I see a flight of geese head south for the winter.
我看到一群大雁南飛過冬去了。
