9. Learning Vocabulary 学习词汇
            A: I don't understand why we have to memorize conversations. We need 
            more vocabulary, not pronunciation.
            B: Don't you think memorizing conversations is a part of learning 
            vocabulary? Every time we memorize a conversation, we're memorizing 
            a whole series of contexts. Each context tells us one way a word can 
            be used, I know from my own language that I can't always use words 
            by simply looking them up in a dictionary and then putting them into 
            sentences. Some words have many meanings. We have to know which 
            meanings go where.
            Notes
            Context (文章或讲话中的)前后文(根据前后文的逻辑可以确定某一个具有多种解释的词或短语的含义)
            Which meanings go where 哪一种解释讲得通
            A:我弄不懂为什么我们一定要记住会话。我们需要的是词汇,而不是发音。
            B:你不认为记住会话是学习词汇的一个组成部分吗?每当我们记住一句会话,我们就记住了全部的上下文。而这上下文可以供我们了解一个单词的一种用法。我从自己的语言中意识到,光靠查词典然后把这些词汇拼成句子,并不意味着会正确使用这些词。有些意识有很多解释。我们必须弄清楚在哪种情况下适用哪一种解释。 
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