2 sentences

1. 我们行动时一定要保持安静，千万不要打草惊蛇。

   wǒ​men xíng​dòng shí yī​dìng yào bǎo​chí ān​jìng, qiān​wàn bù yào dǎ​cǎo​jīng​shé.

   We must keep quiet during our operation and avoid alerting the enemy.

   Source: Dong Chinese Dictionary

2. 他这样做原本是为了打草惊蛇，让其他人不敢再犯。

   tā zhè​yàng zuò yuán​běn shì wèi​le dǎ​cǎo​jīng​shé, ràng qí​tā​rén bù gǎn zài fàn.

   He originally did this to serve as a warning to others.

   Source: Dong Chinese Dictionary