Una
abbr. 联合国协会（United Nations Association）
🗣️ 情景例句
Oh, not at all.
噢 一点也不。
Relax!
放松一下！
The Cutty Sark was one the fastest sailing ships that has ever been built.
“卡蒂萨克”号是帆船制造史上建造的最快的一艘帆船。