The parseWordsFromString() method updates a word map that counts the frequency of each word.

parseWordsFromString()方法更新单词映射，其中统计了每个单词的频率。

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To populate the file, loop through the values in your word map, writing each to a row in your file (see Listing 4).

要填充文件，可循环通过单词映射中的值，将每个值写到文件中的一行(参见清单4)。

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For example, if you are learning new vocabulary, create a word map, describe a picture, make a list and study that.

比如，如果你在学新单词，画一张词汇图、描述一幅图、列个清单然后开始学习。

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For example, if you are learning new vocabulary, create a word map, describe a picture, make a list and study that.

比如，如果你在学新单词，画一张词汇图、描述一幅图、列个清单然后开始学习。

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