2 sentences

1. 那会是灾难性的。

   nà huì shì zāi​nàn​xìng de.

   That'd be disastrous.

   Source: OpenSubtitles

2. 你正在犯一个灾难性的错误。

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

   You are making a catastrophic mistake.

   Source: OpenSubtitles