vocabulary可數嗎?

　　A child's vocabulary expands through reading.

　　孩子的詞匯量通過閱讀得到擴大。

　　Reading will enlarge your vocabulary.

　　閱讀能擴大詞匯量。

　　His speech is immature, his vocabulary limited

　　他說話很幼稚，使用的詞匯有限。

　　Love was a word he'd erased from his vocabulary since Susan's going.

　　自從蘇珊離開后，他再也不提“愛情”這個詞了。

　　Most people have a smaller vocabulary in speech than in writing.

　　多數人口語的詞匯量比書面語少。