2 sentences for 活 (huó — flexible)

1. 规矩是死的，人是活的。

   guī​ju shì sǐ de, rén shì huó de.

   Rules are rigid, but people are flexible.

   Source: Dong Chinese Dictionary

2. 方法是活的，我们要根据实际情况调整。

   fāng​fǎ shì huó de, wǒ​men yào gēn​jù shí​jì qíng​kuàng tiáo​zhěng.

   Methods are flexible; we should adjust them according to the actual situation.

   Source: Dong Chinese Dictionary