gangyaya037
科学论文上一般用solid sphere medicine ball 指的是健身用的。 举例：In this paper, the axisymmetric problems of arbitrary thick spherical shell and solid sphere are studied directly from equilibrium equations of three-dimensional problem, and the general solutions in forms of Legendre series for thick spherical shell and solid sphere are given by using the method of weighted residuals 本文试图从更一般的三维问题基本方程出发研究任意厚球壳与实心球的轴对称问题.对于受任意轴对称载荷的厚球壳和实心球体,文中运用加权残值法给出了以Legendre级数表示的一般解.
爱尔兰咖啡啊
运动日里有很多体育项目比如垒球实心球跑步比赛。There are many sports in sports day, such as softball, solid ball and running.There are many sports on sports day such as the softball solid ball running competition.
