to command a large vocabulary

• 掌握大量词汇

to command a large vocabulary的用法和样例：

例句

1. He commands a large vocabulary.
   他掌握大量词汇。
2. The appearance of the large quantities of new words in Chinese proves that there is a tendency of affixation in Chinese language.
   汉语中新出现的大量词汇说明现代汉语有词缀化的倾向。