Virtual instrument is a kind of instruments of functional meaning, it is composed of computer, instrument hardware and application software.

虚拟仪器是一种功能意义上的仪器，由计算机、仪器硬件及应用软件组成。

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Of course the goal of advertising has always been to present the right message to the right consumers but the current form of television advertising that was ushered in during the Mad Men era is a blunt instrument in an age of computer controlled laser surgery.

FORBES: Content and Context Will Drive the Next Generation of Advertising

Like a motion-controlled video gaming system, the Virtual Music Instrument employs a camera that is mounted on a computer screen and aimed at someone, capturing their gestures.

CNN: One-handed violinist helps the disabled make music

During a colonoscopy, a doctor examines the inside of the colon and rectum by inserting a colonoscope, a thin, flexible instrument that sends images to a TV screen or computer.

CNN: Coming clean about my first colonoscopy