每次使用指南针时，检查地图的上的方位。

Check map orientation each time compass is used.

youdao

中国人知道使用指南针，比欧洲人早好几个世纪。

The use of the compass was known to the Chinese centuries before the European.

youdao

中国人知道使用指南针，比欧洲人早好几个世纪。

The use of the compass was known to the Chinese centuries before the European.

youdao