indicator pointer

例句：

1. 1. The new indicator pointer was designed to improve accuracy in measurement.
   新的指示器指针被设计用来提高测量的准确性。
2. 2.The doctor used the pointer to guide the patient through the procedure.
   医生用指针指导病人完成这个过程。
3. 3. The scientist used a pointer to indicate the location of the sample on the slide.
   科学家用一个指针在幻灯片上指出样本的位置。