[ 第三人称单数 lemmatizes 现在分词 lemmatizing 过去式 lemmatized 过去分词 lemmatized ]
V to group together the inflected forms of (a word) for analysis as a single item 对(屈折变化性词类)进行归类分析 [linguistics]
I didn't know how to handle those problems until I found the NLTK(nature language tools kit). I used the NLTK to lemmatize those words to a normal form.
为了使他们能够还原成单词的原始形态，我使用了NLTK（nature language tools kit） 来做词形还原。
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