词义的缩小和扩大是词义变化的主要部分，是词汇学习的基础。
The application ol ampliation or reduction of inequality is summarized in teaching, and its common methods are pursued.
16世纪时，这个词经由拉丁语传入英语中，它的词义范围由泛指大蒜等植物的鳞茎缩小到仅表示洋葱。
As the word came down to English in the 16th century through Latin it narrowed its meaning from including things like garlic to mostly referring to Onions.
最后，在语义分类和语义编码研究的基础上，从认知入手，深入探讨词义的扩大与缩小。
Third, it probes into the amplification and the narrowing ofthe meaning of words from the cognitive way basing on the research of semantic category and the semantic encoding.
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