The American flag was flying.

美国国旗飘扬。

《牛津词典》

It makes me proud to be an American when I see our flag flying.

这让我感到自豪的是，美国当我看到我们的旗帜飘扬。

youdao

At sunrise, seeing the American flag still flying over the fort, Key was inspired to write the poem known as "the Star-Spangled Banner".

天亮时，当凯伊看到美国国旗仍飘扬在城堡上空的时候，突然灵感勃发，写下了一首题为《星光闪耀的旗帜》的诗作。

youdao

DreamWorks removed posters for the upcoming Robert Redford movie "The Last Castle" that showed an American flag flying upside down.

CNN: Fall movies undergo changes