外网回复：A lexicon is a list of words that belong to a particular language. A dictionary is a list of words and phrases that are (or were) in common usage, together with their definitions - so a dictionary is different from a lexicon because a lexicon is a simple list and doesn't define the words.
lexicon是属于特定语言的单词列表。 dictionary是一个（或曾经）常用的单词和短语及其定义的列表-因此，lexicon与dictionary不同，因为lexicon是一个简单的列表并且未定义单词。