dual-beam dual-wavelength spectrometer双: two; twin; both; dual光束: light beam a surname波长: wavelength双光束双波长紫外-可见分光光度计: double-beam dual wavelength uv-vis spectrophotometer波长分光计: wave length spectrometer; wavelength ectrometer; wavelength spectrometer下载手机词典可随时随地查词查翻译