interj. An exclamation expressive of disgust, horror, or recoil.
Its utterance is usually accompanied by a shudder.
interj. 咄!, 啊!, 呸!
1. Ugh, I can't believe I forgot my homework again.
唉，我真不敢相信我又忘记带作业了。
2. Ugh, it's so hot outside; I wish it would cool down.
唉，外面太热了；我希望天气能凉快一些。
3. Ugh, this movie is so boring; let's watch something else.
唉，这部电影太无聊了；我们换一部看吧。