别提了。
Bié tí le.
Don't mention it.

用法说明

这句话的字面意思是不要再说（这个话题）了。单独使用时表示说话人沮丧和失望的心情。常在别人询问事情或状况后使用,意思是发生了不好的事情，自己心情不好。但并不是真的不想说了,通常会在说完这句话后向对方解释发生了什么不好的事.Literally this sentence means "don't mention this topic" or "don't talk about this any more". When used independently, it conveys a depressed and disappointed feeling of the speaker. It's always used to answer someone' inquiry about the situation after something undesirable happened. The answer suggests the speaker is not in a good mood, but it does not mean he/she doesn't want to talk about it. Generally he/she will detail what the bad thing is after saying "别提了(Bié tí le)".

例句

1、 甲：好久没见了，你跟你女朋友结婚了吗？

      Jiă: Hǎojiǔ méi jiàn le, nǐ gēn nǐ nǚ péngyǒu jiéhūn le ma?

      A: Long time no see! Did you get married with your girlfriend?

      乙：别提了！早分手了。

      Yǐ: Bié tí le! Zǎo fēnshǒu le.

      B: Don't mention that! We broke up long ago.

2、 甲：你怎么用这么旧的手机？你的新手机呢?

      Jiă: Nǐ zěnme yòng zhème jiù de shǒujī? Nǐ de xīn shǒujī ne?

      A: Why are you using such an old cell phone? Where is your new one?

      乙：别提了，刚买了一个月就被偷了。

      Yǐ: Bié tí le, gāng mǎi le yí gè yuè jiù bèi tōu le.

      B: Don't mention that. It was stolen just one month after I bought it.

• sentence [´sentəns]   n.判决 vt.宣判；处刑   (初中英语单词)
• speaker [´spi:kə]   n.演讲人；代言人   (初中英语单词)
• inquiry [in´kwaiəri]   n.询问；质询；调查   (初中英语单词)
• stolen [´stəulən]   steal 的过去分词   (初中英语单词)
• saying [´seiŋ, ´sei-iŋ]   n.言语；言论；格言   (高中英语单词)
• independently [,indi´pendəntli]   ad.独立地；自由地   (英语六级单词)
• depressed [di´prest]   a.消沉的；萧条的   (英语六级单词)
• undesirable [,ʌndi´zaiərəbəl]   a.&n.不受欢迎的(人)   (英语六级单词)