学术与科学:

“D/A”是“Digital-to-Analog converter”的缩写，意思是“

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“A/D”是“Analog-to-Digital”的缩写，意思是“模拟到数字

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“dB”是“DeciBel”的缩写，意思是“分贝”

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“DE-9”是“9-pin D-SUB (series D subminiature)

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“DA-15”是“15-pin D-SUB (series D subminiature)

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“DB-25”是“25-pin D-SUB (series D subminiature)

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“DC-37”是“37-pin D-SUB (series D subminiature)

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“DD-50”是“50-pin D-SUB (series D subminiature)

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“D-SUB”是“Series D SUBminiature connector”的缩写，

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“dBm”是“Decibel relative to one milliwatt”的缩写，

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