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一种主题标引方式。在标引时,没有找到与文献主题含义相对应的专指概念或组配概念,而使用词表中概念更加宽泛的上位概念进行标引的方法。又称上位标引。
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longitudinal research on education
longitudinal resolution
longitudinal resolution of ultrasound imaging
longitudinal resonance
longitudinal rolling
longitudinal scan
longitudinal seam submerged-arc welded steel pipe
longitudinal section
Longitudinal single case
longitudinal spherical aberration
longitudinal (spin-lattice) relaxation time
longitudinal [spin-lattice] relaxation time
longitudinal spin lattice relaxation time
longitudinal spin-lattice relaxation time
longitudinal strength
longitudinal study
longitudinal/transverse resolution of ultrasound imaging
longitudinal turbulence
longitudinal vaginal septum
longitudinal-valley fault in taiwan
longitudinal ventilation
longitudinal view
longitudinal viscosity
longitudinal wave
longitudinal Zeeman effect
科学参考收录了854744条科技类词条,基本涵盖了常见科技类参考文献及英语词汇的翻译,是科学学习和研究的有利工具。
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