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...
A good sharp dressing counterpointed the sweetness of the dried fruit.味道浓烈的上好调味品和香甜的干果形成有趣的对比。Florida oranges have a natural sweetness.佛罗里达柑橘带有一种天然的甘甜。a smile of great sweetness十分甜蜜的微笑...