说明：  利用FLASM编写的可动态演示三角形的四心（内心，外心，重心，垂心）以及四线（角平分线，中线，高，中垂线）
( Written using FLASM dynamically demonstrate the triangular Tudor (inner, external, center of gravity, orthocenter) and four wire (Angle bisector, middle, high, midperpendicular) )