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1A small, slender hand-held device emitting a laser beam, used for scanning bar-codes.
2A hand-held device emitting a narrow beam of coloured light, typically used by speakers to project a visual pointer on to a screen.
1980s; earliest use found in Industry Week.
雅致网英汉双解词典包含236457条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。