必不可少

kōng qì hé shuǐ duì shēng mìng shì bì bù kě shǎo de

空气和水对生命是必不可少的。

Air and water are indispensable for life.

duì jiàn kāng bì bù kě shǎo de shuì mián

对健康必不可少的睡眠

sleep that is critical to one's health

yǔ yán shì xué xiào kè chéng zhōng bì bù kě shǎo de bù fen

语言是学校课程中必不可少的部分。

Languages are an essential part of the school curriculum.

qì chē yǐ jīng chéng le wǒ men shēng huó zhōng bì bù kě shǎo de yī bù fen

汽车已经成了我们生活中必不可少的一部分。

Cars have become an indispensable part of our lives.

xuǎn jǔ chéng xù bì bù kě shǎo de yī bù fen

选举程序必不可少的一部分

vital part of the election process