“principal line”的概念、定义、翻译、参考文献-科学参考

单词	principal line
释义	principal line [`prin·sǝ·pǝl `līn] ^{GRAPHIC ARTS} The trace of the principal plane upon a photograph. ^SPECTROSCOPY That spectral line which is most easily excited or observed.
随便看	shikimic acid Shillelagh shim shimmer shimmy shim rod shingle shingle barchan shingle beach shingle-block structure shingle lap shingle nail shingle rampart shingle ridge shingles shingle structure shingling shin splints Ship ship ship auger shipbuilding ship drift shipfitter ship heading marker

科学参考收录了103327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。