internally tangent circle

例句：

1. 1. The engineerused a computer program to calculate the internal tangent circle of the object.
   工程师使用计算机程序来计算物体的内部切线圆。
2. 2.The researcher found that the internal tangent circle of the planet was responsible for its magnetic field.
   研究者发现，行星的内部切线圆对其磁场负有责任。
3. 3. The scientist discovered an unusual phenomenon where the internal tangent circle of a star intersected with its surface.
   科学家发现了一个不寻常的现象，即一颗星的内部切线圆与其表面相交。