"Vocabulary accumulation" 是学好英语的基础。这个短语的来源是由两个单词组成的，"vocabulary" 指词汇，"accumulation" 指积累。
例句：
Building a strong vocabulary is essential for achieving fluency in Engpsh. (建立强大的词汇是英语流利的基础。)
Vocabulary accumulation is key to passing the TOEFL exam. (词汇积累是通过 TOEFL 考试的关键。)
Reading widely is one of the best ways to increase your vocabulary accumulation. (广泛阅读是增加词汇积累的最佳方式之一。)