Undis
[计]= UN Documentation Information System,联合国文献资料系统
🗣️ 情景例句
I'm afraid i have a complaint to make.
恐怕我要提点意见。
Necessity and oportunity may make a coward valient.
需要和机会可能使懦夫变成勇士。
Yes, I see. How can they get rid of waste water in this way? What a terrible colour the sea is now! It looks as if our class won't be able to bathe at all.
是的，我看见了。他们怎么能这样排放废水呢？海水的颜色多么可怕呀！看来我们班同学根本不能在这里游泳。