4 sentences

1. 你正在犯一个灾难性的错误。

   nǐ zhèng​zài fàn yī​ge zāi​nàn​xìng de cuò​wù.

   You are making a catastrophic mistake.

   Source: OpenSubtitles

2. 他在欧洲的表现是灾难性的。

   tā zài ōu​zhōu de biǎo​xiàn shì zāi​nàn​xìng de.

   His performance in Europe was disastrous.

   Source: CCMatrix

3. 后果对你来说可能是灾难性的。

   hòu​guǒ duì nǐ lái​shuō kě​néng shì zāi​nàn​xìng de.

   The consequences could be disastrous for you.

   Source: CCMatrix

4. 在大多数情况下，“不工作”并非灾难性的。

   zài dà​duō​shù qíng​kuàng xià,“ bù gōng​zuò” bìng​fēi zāi​nàn​xìng de.

   In most cases, ‘not working’ isn’t catastrophic.

   Source: CCMatrix