/tu:l ||; tul/noun [C] a piece of equipment such as a hammer, that you hold in your hand(s) and use to do a particular job 工具: Hammers, screwdrivers and saws are all carpenter's tools. 锤子、起子和锯子都是木匠的工具。garden tools 园艺工具a tool kit (= a set of tools in a box or a bag) 工具箱╱袋 ☞A tool is usually something you can hold in your hand, for example a spanner or hammer. An implement is often used outside, for example for farming or gardening. A machine has moving parts and works by electricity, with an engine, etc. An instrument is often used for technical or delicate work a dentist's instruments. A device is a more general word for a piece of equipment that you consider to be useful and that is designed to do one particular task The machine has a safety device which switches the power off if there is a fault. tool通常指可拿在手里的工具，如扳子或锤子。implement通常在户外使用，如农具或园艺工具。machine指有活动部件，用电力、发动机等推动的机器。instrument常指用于技术性或精细工作的工具：a dentist's instruments牙医用具。device泛指用于执行某特定任务的有用工具或装置：The machine has a safety device which switches the power off if there is a fault.这台机器有安全装置，一有故障就会关掉电源。