functional
adjective uk/ˈfʌŋk.ʃən.əl/ us/ˈfʌŋk.ʃən.əl/
(USEFUL)
B2 为实用而设计的，实用的
designed to be practical and useful rather than attractive
functional clothing 很实用的服装
(WORKING NORMALLY)
（机器、系统等）正常工作的
(of a machine, system, etc.) working in the usual way
Is the central heating functional yet? 中央供暖系统工作恢复正常了吗？
See also: dysfunctional
功能性的
performing a particular operation
a functional disorder (= when an organ does not work as it should) 功能紊乱
See also: multifunctional
(LANGUAGE)
language specialized（语言）功能性的，实用性的（如道歉、提问或拒绝等）
relating to language functions, for example saying sorry, asking for something, or refusing something
The course will teach participants functional language. 该课程教给参与者实用的语言。
Spanish functional phrases being taught to the police include "Calm down", "Speak Slower" and "You're under arrest". 给西班牙警察教授的实用短语包括“冷静下来”、“慢点说”和“你被捕了”。