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器械;器具
An instrument is a tool or device that is used to do a particular task, especially a scientific task.
例句
...a thin tube-like optical instrument.
試管狀的細長光學儀器
...instruments for cleaning and polishing teeth...
清洗和拋光牙齒的器械
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樂器
A musical instrument is an object such as a piano, guitar, or flute, which you play in order to produce music.
例句
Learning a musical instrument introduces a child to an understanding of music.
學一門樂器能引導孩子了解音樂。
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儀器;儀表
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.
例句
...crucial instruments on the control panel.
控制面板上的重要儀表
...navigation instruments.
導航儀器
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工具;手段;被他人利用的人
Something that is an instrument for achieving a particular aim is used by people to achieve that aim.
例句
The veto has been a traditional instrument of diplomacy for centuries.
幾個世紀以來否決權一直是外交上慣用的手段。