单词	总光圈大小
释义	总光圈大小 overall f-number
随便看	visible service Visible Shunting System visible signal visible, signal visible size visible skills visible sky angle visible smoke visible software visible sound method visible space visible specrtrophotometry visible spectra Visible spectral reflectance visible spectral remote sensing visible spectrometer visible spectrometry visible spectrophotography visible spectrophotometer visible spectro-photometric method visible spectrophotometry visible spectro-photometry visible spectroscopy visible watermarking arithmetic visible waterproof structure