By using the thought way of seven-star-chart, assessment method,this paper illustrates the effective factors of the energy, resource and environment when engineering material has been selected.
应用七点星形图评价的思想方法,说明了材料选择时应考虑的能源、资源与环境相关的影响因素,提出了在确定机械制造领域应用工程材料时的选择策略,给出了多影响因素下材料绿色度评价的方法,该方法可以作为绿色工程材料选择的依据或参考。
A polygon having seven sides.
七边形有七条边的多边形
Seven-sided shape that can be customized by dragging any selection handle.
可通过拖动任一选择手柄来自定义的七边形。
Caoqiqiao in Contemporary Literature:One Kind of Mother Image--Read banbianying,hongtanban,xiaojiemen;
当下文学中的曹七巧:母亲形象的一种——读《半边营》、《红檀板》、《小姐们》
Local Lagrange Interpolation by Bivariate Splines of Degree Seven on Triangulated Quadrangulation
四边形三角化部分下二元七次样条函数空间上局部Lagrange插值
Here are the main idea: Ming dynasty government adopts special frontier policy to set up seven garrisons in the west of Jiayu Pass is just because of its special situation of northwest frontier.
认为：正是明代特殊的西北边疆形势，才使明政府采取了特殊的边疆政策——设置关西七卫。
By the wall stood seven little beds side by side.
墙边并排放着七张小床。
A polygon having six sides.
六边形有六个边的多边形
A polygon having five sides and five interior angles.
五边形有五条边和五个内角的多边形
A polygon with ten angles and ten sides.
十边形有十个角和十条边的多边形
THE SITUATION IN THE SUMMER OF 1957
一九五七年夏季的形势
Suppose the width of a rectangle is seven meters.
设长方形的宽是七米。
an eleven-sided polygon.
有十一条边的多边形。
a three-sided regular polygon.
有三条边的等边多角形。
A quadrilateral having no parallel sides.
没有平行边的四边形
""strolling strings" approach"
“边行边奏”演出形式
a twelve-sided polygon.
有十二条边的多边形。
A polygon with eight sides and eight angles.
八边形，八角形有八条边和八个角的多边形
Containing a hexagon or shaped like one.
六边形的含有一个六边形或六边形状的