double beam spectrophotometerdouble-beam spectrophotometerdouble-beam system双束: two-beam分光: spectral; beam split光度计: photometer; photometric rece ...单光束分光光度计: single beam eotrophotometer; single beam spectrophotometer; single-beam ectrophotometer; single-beam spectrophotometer双光束分光光度计: double beam ectrophotometer; double beam spectrophotometer; double-beam spectrophotometer; doublem-beam spectrophotometer; dual beam spectrophotometer下载手机词典可随时随地查词查翻译