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ex·pan·sion AHD[ĭk-spănʹshən] D.J.[ɪkˈspænʃən]K.K.[ɪkˈspænʃən]n.（名词）- The act or process of expanding:扩张： 扩张的行为或过程：the new nation's expansion westward.新国家的西部扩张
- The state of being expanded.被扩大的状态
- An expanded part:延伸部分：an expansion of a river.河流的延伸部分
- A product of expanding:扩充物：由扩展行为造成的东西：a book that is an expansion of the author's Ph.D. thesis.这部书是作者哲学博士论文主题的延伸
- The extent or amount by which something has expanded.扩展部分：某物延展的长度或数量
- Increase in the dimensions of a body.身体体积的增加
- Mathematics 【数学】
- A quantity written in an extended form, as a sum of terms or a continued product.展开式：以展开形式写出的量，象数字的总和或连续的乘积
- The process of obtaining this form.展开：得到展开式的过程
- An expanse.广阔
- A period of increased economic or business activity.经济或商业行为的扩展时期
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