Modifier + 系统
系统 (xìtǒng) means "system" and is used for organized structures, networks, or methods. It appears frequently in technical contexts such as 操作系统 (operating system), 系统工程 (systems engineering), and 消化系统 (digestive system). It can function as both a noun and an adjective meaning "systematic."
我们公司最近升级了办公系统。
Wǒmen gōngsī zuìjìn shēngjí le bàngōng xìtǒng.
Our company recently upgraded its office system.
人体的消化系统非常复杂。
Réntǐ de xiāohuà xìtǒng fēicháng fùzá.
The human digestive system is very complex.
你应该系统地学习这门课程。
Nǐ yīnggāi xìtǒng de xuéxí zhè mén kèchéng.
You should study this course systematically.