“periostracum”的概念、定义、翻译、参考文献-科学参考

单词	periostracum
释义	periostracum [´per·ē`äs·trǝ·kǝm] ^{INVERTEBRATE ZOOLOGY} A protective layer of chitin covering the outer portion of the shell in many mollusks, especially fresh-water forms.
随便看	continuous-wave laser continuous-wave modulation continuous-wave radar continuous-wave tracking system continuous weld continuous work continuous x-rays continuum continuum mechanics continuum physics contorted contour contour analysis contour-change line contour code contour feather contour finder contour forming contouring control contouring temperature recorder contour integral contour interval contourite contour line contour machining

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。