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百度
谷歌
图片
维基
百科
spot check
spot checker
spot chromatography
spot cleaner
spot collector
spot colorimetry
spot commodity
spot contact bearing
spot contract
spot corrosion
spot cotton
spot cure
spot curer
spot deal
spot definition
spot delivery
spot desmosome
spot diameter
spot displacement
spot distortion
spot drilling
spot elevation
spot entry
spot error indicator
spot exchange
spot exchange market
spot exchange rate
spot exchange transaction
spot face
spot facing
spot check
n.
抽样调查, 抽查