摘要杂化轨道理论是大学无机化学、结构化学课程的重要内容，是后续元素化合物学习的基础。

Abstract Hybrid orbital theory is an important content of inorganic chemistry and structural chemistry in college text book, and it is the basis for further study of element compounds.

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维生素B_（12）及其衍生物以其独特的结构和重要的生理功能成为当前医学、生物化学和无机化学的重要研究课题。

Vitamin B_(12) and its derivatives are becoming the important research subject in medicine, biochemistry and abiochemistry for their particular structure and important physiological functions.

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杂化轨道理论是无机化学和结构化学课程重要的知识点。

Theory of hybrid atomic orbital is an important point in inorganic chemistry and structure chemistry.

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