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
I couldn't help laughing.
我忍不住笑出来。
This window is just as wide as that one.
这扇窗户刚好和那扇一样宽。
Welcome back to school!
欢迎回校！