“球体的”用英语怎么说

活跃的脂肪酶与圆球体的膜相结合.Active lipase is associated with the membrane of the spherosomes.网球与球体的形状相同.A tennis ball is the same shape of a globe.找出球体的表面面积,并准确到两个小数位.Find the surface area of the sphere corrected to 2 decimal places...