Usn
abbr. 美国海军（United States Navy）
📖 牛津释义
USN
abbr
缩写 = United States Navy 美国海军.
🗣️ 情景例句
Take care on your way back.
回程保重了。
I would like to enlarge this film.
我要放大这底片。
Do you go to work by bike?
你骑自行车上班吗？