[gōng jù]
(进行生产劳动所使用的器具) tool; means; implement; appliance
take good care of the tools
爱护工具
carpenter's tools
木工工具
implements of production
生产工具
means of transport
运输工具
improvement of tools
工具改革
(用以达到目的事物) instrument
act as sb.'s instrument
充当某人的工具
Language is an instrument for communication.
语言是交际的工具。