5 sentences

1. 这次手术事关生死。

   zhè cì shǒu​shù shì​guān shēng​sǐ.

   This surgery is a matter of life and death.

   Source: Dong Chinese Dictionary

2. 此事生死攸关，千万不可大意。

   cǐ shì shēng​sǐ yōu guān, qiān​wàn bù kě dà yì.

   This is a matter of life and death; you must not be careless under any circumstances.

   Source: Dong Chinese Dictionary

3. 这种关乎生死的大事，岂能视同儿戏？

   zhè zhǒng guān​hū shēng​sǐ de dà​shì, qǐ néng shì​tóng ér​xì?

   How can a matter of life and death be treated as child's play?

   Source: Dong Chinese Dictionary

4. 许多宗教都相信因果报应和生死轮回。

   xǔ​duō zōng​jiào dōu xiāng​xìn yīn​guǒ bào​yìng hé shēng​sǐ lún​huí.

   Many religions believe in karma and the cycle of life and death.

   Source: Dong Chinese Dictionary

5. 在这个生死的关头，我们必须保持冷静。

   zài zhè​gè shēng​sǐ de guān​tóu, wǒ​men bì​xū bǎo​chí lěng​jìng.

   At this life-and-death moment, we must remain calm.

   Source: Dong Chinese Dictionary