He met Liza in his park.他在园林里遇到了莉莎.Liza giggled triumphantly, and the little ones strove to emulate her.莉莎得意地“哧哧”笑起来, 那些小的也不甘落后.Liza's dress took the shine out of all the female guests.莉莎的衣着使所有女宾的服装黯然失色....
Construct an animation of the deltoid sliding on two mutually perpendicular lines.建构一动态绘图:展示三角线沿著互相垂直的两轴滚动.Construct two mutually orthogonal tangents of the deltoid. Where do they meet?三角星形线的两条互相垂直的法线的交点在哪里?Construct rot...