中文摘要：

依据对复杂网络和灰色系统理论的相关分析，提出了复杂网络中的灰点问题，认为灰点分为存在而未知的灰点和演化灰点两类，并给出了相关定义。进一步给出复杂网络灰度问题的相关描述，将网络灰度分为相对灰度和绝对灰度，并分别进行了证明。

英文摘要：

Based on the theory of complex network and gray system, the sugesstion that there exist two types of gray nodes in complex networks, Gray Node I and Gray Node II, is concluded. The first one refers to the existent unknown gray nodes, and the second the evolution gray nodes. The relevant definitions are also given. Further- more, grayness degree in complex networks is described and divided into two forms--the relative grayness degree （RGD） and the absolute grayness degree （AGD）, which are proved respectively.