radially unbounded function

例句：

1. 1.The radial unbounded function is a crucial part of the model.
   径向无界函数是该模型的关键部分。
2. 2.The radial unbounded function has been used to describe the behavior of the sun's corona.
   径向无界函数被用来描述太阳日冕的行为。
3. 3. The radial unbounded function is used in many areas of mathematics and physics.
   径向无界函数在数学和物理学的许多领域都有应用。