八年级《物理》(人教版)下册课本第62页有一幅图,图中所示是我国早期的指南针——司南,如右图．司南是我国春秋战国时期发明的一种指示方向的仪器．司南之“司”意为“指”．“司南之杓,投之於地,其柢指南”．由于司南在使用时很不方便,所以它渐渐演变为浮于水中的指南鱼,最终成为指南针． There is a picture on page 62 of the eighth grade “Physics” (PEP). The picture shows China’s early compass, Sinan, as the right picture. Sinan is an instrument instructing direction in the Spring and Autumn and Warring States period in China. Sinan’s “division” means “finger”. “Sirius of the South, cast to the ground, the other guide.” Because Si Nan was inconvenient when used, it gradually evolved into a guide fish floating in the water and eventually became a compass.