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中文摘要：
在三角函数空间Ф7=span{1，sint，cost，cos2t，sin3t，cos3t，sin4t，cos4t}和Фs=span{1，sint，cost，sin2t，cos2t，sin3t，cos3t，sin4t，cos4t}中构造了B-L（B6zier-Like）线，并给出其显式表达式。进一步讨论了该曲线的若干性质和应用，给出了不需要有理形式的心脏线、椭圆（圆）弧等的B—L曲线精确表示，椭球（球）面的B—L曲面精确表示，以及圆柱螺线的B—L曲线逼近表示。通过实例说明在造型设计方面使用简便且有效。
英文摘要：
The B-L（Bezier-Like） curves over the trigonometric function Space Ф7=span{1,sint,cost,cos2t,sin3t,cos3t,sin4t,cos4t} and Фs =span {1, sint, cost, sin2t, eos2t, sin3t, eos3t, sin4t, cos4t} are constructed, the explicit expressions of the B-L curves are presented.Then some properties and applications of this kind of curves are diseussed.Cardioid,elliptic curves,circular arc,ellipsoid, sphere without rational form are precisely expressing,and circular helix is approximated by the B-L curves.Examples are given to illustrate the convenience and validity in model design.
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