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词汇 motion detector
释义

Definition of motion detector in English:

motion detector

noun
  • 1A motion sensor.

  • 2Biology a cell or organ that is sensitive to movement.

Origin

1960s; earliest use found in British Patents.

Definition of motion detector in US English:

motion detector

noun
  • 1A motion sensor.

  • 2Biology a cell or organ that is sensitive to movement.

Origin

1960s; earliest use found in British Patents.

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