求翻译：第六，购买足够的英文工具书。字典之类的参考书，乃是语言学习者不可或缺的工具。要想“学好”英文，除了需要良师指导外，还必须靠自己自修。是什么意思？

Sixth, the purchase of English books. Dictionary like reference books, but an indispensable tool for language learners. In order to "learn" English, in addition to the need for mentoring, but also must rely on their own self-study.

The first 6, purchase enough of the English dictionary. Dictionary of the reference books, such as language learning, is an indispensable tool. If you want to "learn" in English, in addition to the need to mentor guidance, you must also rely on their own self-study.

Sixth, purchases the enough English reference book.The dictionary and so on reference book, is the language learner's indispensable tool.Must think “learns” English, besides needs good to instruct, but also must depend on oneself studies independently.

VI, enough reference books in the English language. Reference books such as dictionaries, is the indispensable tool for language learners. If you want to "learn" in English, in addition to the need for mentors guidance, also have to study on their own.