本文首先讨论文献中有关词汇能力的主要理论阐述,并提出从第二语言词汇发展过程来看词汇能力能使我们更好地把握第二语言词汇能力本质的观点。然后,本文对词汇能力的核心部分词汇知识的本质问题进行了简要的概括。最后,本文对词汇知识的两种测量方法以及各自的特点和存在的问题进行了探讨。 This article first discusses the main theories of lexical abilities in the literature and puts forward the viewpoint that lexical abilities can make us grasp the essence of lexical abilities of second language better from the developing process of second language lexicon. Then, this article briefly summarizes the essence of vocabulary knowledge in the core part of vocabulary ability. Finally, this paper discusses two measurement methods of vocabulary knowledge, their respective characteristics and existing problems.