| 单词 | spectrum-line |
| 释义 | > as lemmasspectrum-line b. Miscellaneous, as spectrum allocation, spectrum-band, spectrum-line, spectrum microscope, spectrum photography, spectrum work. ΚΠ 1871 tr. H. Schellen Spectrum Anal. 101 The number of the spectrum-lines of a substance. 1871 tr. H. Schellen Spectrum Anal. 456 Qualitative Analysis..by means of the spectrum microscope. 1889 Internat. Ann. Anthonys Photogr. Bull. 389 The bath plate is less suitable for spectrum photography. 1891 Internat. Ann. Anthonys Photogr. Bull. 357 The yet hardly visible spectrum band. 1899 Lockyer in Daily News 13 Nov. 6/7 For this spectrum work very rapid isochromatic plates..should be employed. 1960 McGraw-Hill Encycl. Sci. & Technol. XI. 260/1 (caption) Radio spectrum allocations. 1980 Sci. Amer. Feb. 32/1 The control of interference lies at the heart of spectrum allocation, which entails the development of systematic plans for the use of frequencies in radio communication. < as lemmas |
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