电脑系统有时候也会出错。

Diànnǎo xìtǒng yǒushíhou yě huì chūcuò.

Computer systems sometimes make mistakes, too.

这个系统对我们很重要。

Zhège xìtǒng duì wǒmen hěn zhòngyào.

This system is important to us.

医生说我的免疫系统有问题。

Yīshēng shuō wǒde miǎnyì xìtǒng yǒu wèntí.

The doctor said there’s something wrong with my immune system.