pen carbon paper 中文意思是什麼

pen carbon paper 解釋
鋼筆復寫紙
  • pen : n 1 筆尖；筆[筆尖和筆桿]；〈古語〉鵝毛（管）筆。2 筆力，文體，筆法；文筆；文章。3 書法家；作家。4...
  • carbon : n. 1. 【化學】碳。2. 【電學】碳精棒[片、粉]；碳精電極。3. （一張）復寫紙。4. 復寫的副本。
  • paper : n 1 紙；裱墻紙。2 報紙，報。3 收據；債券；證券；票據；匯票；鈔票（＝paper money）。4 〈pl 〉身份...
  1. Carbon nanotubes and polycyclic aromatic hydrocarbons ( pahs ) are important research objects of structural chemistry. hexagonal system, which is used to represent mathematicaliy pahs in organic chemistry, is developed perfectly in this century. while the theories concerning different topological invariants and parameters on hexagonal systems tend gradual1y to achieve great successes, the performance of the calcu1ations by pen and paper is still rather tedious, or even impossibie, when the size of molecules increases

    碳納米管和多環芳烴（ pah ）是結構化學的重要研究對象，從圖論角度描述有機化學中多環芳烴的六角系統在近代得到了很大的發展，對六角系統的各種拓撲不變量和一些參數的計算已趨完善或正在逐步完善。
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