7 sentences

1. 纪律是必不可少的。

   jì​lǜ shì bì​bù​kě​shǎo de.

   Discipline is essential.

   Source: OpenSubtitles

2. 饺子是年夜饭桌上必不可少的。

   jiǎo​zi shì nián​yè​fàn zhuō shàng bì​bù​kě​shǎo de.

   Dumplings are essential at the New Year's Eve dinner table.

   Source: Tatoeba

3. 氧是维持生命必不可少的元素。

   yǎng shì wéi​chí shēng​mìng bì​bù​kě​shǎo de yuán​sù.

   Oxygen is an essential element for sustaining life.

   Source: Dong Chinese Dictionary

4. 氧气对人类的生存是必不可少的。

   yǎng​qì duì rén​lèi de shēng​cún shì bì​bù​kě​shǎo de.

   Oxygen is essential for human survival.

   Source: Dong Chinese Dictionary

5. 我可是飞机制造必不可少的一员。

   wǒ kě​shì fēi​jī zhì​zào bì​bù​kě​shǎo de yī yuán.

   I'm essential to aircraft production.

   Source: OpenSubtitles

6. 电子产品已成为现代家庭中必不可少的消费品。

   diàn​zǐ chǎn​pǐn yǐ chéng​wéi xiàn​dài jiā​tíng zhōng bì​bù​kě​shǎo de xiāo​fèi​pǐn.

   Electronic products have become essential consumer goods in modern households.

   Source: Dong Chinese Dictionary

7. 土地、原材料和生产工具都是农业生产中必不可少的生产资料。

   tǔ​dì, yuán​cái​liào hé shēng​chǎn gōng​jù dōu shì nóng​yè shēng​chǎn zhōng bì​bù​kě​shǎo de shēng​chǎn zī​liào.

   Land, raw materials, and production tools are all essential means of production in agriculture.

   Source: Dong Chinese Dictionary