spheric head probe

例句：

1. 1. The spherical head probe was used to measure the size of the planet.
   球形头探针对测量行星的大小起到了作用。
2. 2. The spherical head probe was used to study the structure of the molecule.
   球形头探针对研究分子的结构起到了作用。
3. 3. The spherical head probe was used to detect the presence of a foreign object in the spacecraft.
   球形头探针对探测太空船中外来物体的存在起到了作用。