Type the number of pixels you wish to expand or contract your selection by, and then click OK.
输入你想要扩展或收缩的像素然后点击确定。
The issue of type selection of construction contract has been studied on engineering fields while less were researched in economics for further discussion.
工程合同类型选择问题在工程实践中研究较为广泛，然而对于该问题的更深层次的探讨，特别是在经济学领域的探索却相对较少。
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