"Buy some word books" in Engpsh can be translated as "purchase some dictionaries."
The phrase "word book" is a direct translation of the Chinese phrase "单词书" and refers to a book containing a pst of words and their definitions, also known as a dictionary.
Example Sentences:
I need to buy some word books to improve my Engpsh vocabulary.
Can you purchase some dictionaries for me? I want to expand my vocabulary.
I can't find the word I'm looking for, maybe I need to buy a new word book.
翻译：
我需要买些单词书来提高我的英语词汇量
你能帮我买些单词书吗？我想扩大我的词汇量。
我找不到我要找的词，也许我需要买一本新的单词书。