Una
abbr. 联合国协会（United Nations Association）
🗣️ 情景例句
If we're all prepared to recycle paper, thousands of trees could be saved every day.
如果纸能被循环利用，那么每天千千万万的树木就可得以挽救。
This is a revolutionary new product.
这是一种革命性的新产品。
I can help myself, thanks.
我自己来，谢谢。