instrument

1. N-COUNT An instrument is a tool or device that is used to do a particular task, especially a scientific task. 器械

...instruments for cleaning and polishing teeth. …清洁和抛光牙齿的各种器械。

2. N-COUNT A musical instrument is an object such as a piano, guitar, or flute, which you play in order to produce music. 乐器

Learning a musical instrument introduces a child to an understanding of music. 学习一种乐器能引导孩子对音乐有所了解。

3. N-COUNT An instrument is a device that is used for making measurements of something such as speed, height, or sound, for example, on a ship or plane or in a car. 仪器

The design of crucial instruments on the control panel will have to be improved. 控制板上关键仪器的设计必须要改进。

4. N-COUNT Something that is an instrument for achieving a particular aim is used by people to achieve that aim. 手段

The veto has been a traditional instrument of diplomacy for centuries. 数世纪以来，否决已经成为一种传统的外交手段。