2 sentences

1. 我们才不是天敌呢。

   wǒ​men cái bù shì tiān​dí ne.

   We are not natural enemies.

   Source: OpenSubtitles

2. 螃蟹的甲壳保护它免受天敌的伤害。

   páng​xiè de jiǎ​qiào bǎo​hù tā miǎn shòu tiān​dí de shāng​hài.

   The crab's shell protects it from predators.

   Source: Dong Chinese Dictionary