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primary source
释义
WORD PARTNERSHIP 词语搭配 〔primary〕a primary source of information 消息的直接来源英汉大词典the use of primary source materials 第一手材料的使用牛津商务
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attenuation index
attenuation length
attenuation limit
attenuation mean free path
attenuation measurement
attenuation network
attenuation of sound
attenuation pad
attenuation quotient
attenuation rate
attenuation ratio
attenuation region
attenuation slope
attenuation stability
attenuation step pilot lamp
attenuation-frequency distortion
attenuative power
attenuator
attenuator
attenuator resistance
attenuator tube
attenuvax
atter
atteration
attercoppe
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