2 sentences

1. 只要好人袖手旁观，恶人就会得胜。

   zhǐ​yào hǎo​rén xiù​shǒu​páng​guān, è​rén jiù huì dé​shèng.

   As long as good people do nothing, evil will triumph.

   Source: Tatoeba

2. 朋友遇到了困难，我们不能袖手旁观。

   péng​you yù​dào le kùn​nan, wǒ​men bù néng xiù​shǒu​páng​guān.

   When a friend is in trouble, we cannot just stand by and watch.

   Source: Dong Chinese Dictionary