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...
部署在欧洲水域之外的战舰数量差不多增加了一倍。The number of warships stationed outside European waters roughly doubled.一栋类似的房子位于城南部就要贵一倍的价钱。A comparable house in the south of the city would cost twice as much.出席会议的人数比预期的多一倍。Double the expected...