体系 (tǐxì) means "system" or "framework," referring to an organized set of principles, structures, or networks that function together. It is used to describe large-scale organized structures such as transportation systems, political systems, or theoretical frameworks. The term conveys a sense of interconnected, comprehensive organization.
他们正在建立一套新的教育体系。
Tāmen zhèngzài jiànlì yī tào xīn de jiàoyù tǐxì.
They are establishing a new education system.
中国古代有一套完整的官僚体系。
Zhōngguó gǔdài yǒu yī tào wánzhěng de guānliáo tǐxì.
Ancient China had a complete bureaucratic system.
这个城市的交通体系非常发达。
Zhège chéngshì de jiāotōng tǐxì fēicháng fādá.
This city's transportation system is very well developed.