net提供了一个在线的可搜索函数库，它对于查找有关PHP方法的详细信息和学习语言构造有很大的帮助。
PHP.net offers an online searchable function library that is a great aid to finding detailed information on PHP methods and to hunting down builds of the language.
根据这几年的教学经验，本文就亥姆霍兹函数的理解进行了讨论，希望对学习物理化学的同学有所帮助。
Based on the years teaching experience, how to understand Helmholtz was discussed, which would help the students to learn physical chemistry more easily.
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