B-17s
【航空学】第二次世界大战中使用的一种四引擎中翼轰炸机\\nn. 17's = Flying Fortress
🗣️ 情景例句
What time does the library close?
图书馆什么时候闭馆？
One cannot eat one's cake and have it.
事难两全其美。
THE LOST BOOK
一本丢失的书