在20世纪，无线电信标台与卫星网络让飞机和船舰确定其位置。

In the 20th century, radio beacons and satellite networks allowed aircraft and ships to determine their position.

youdao

在20世纪，无线电信标台与卫星网络让飞机和船舰确定其位置。

In the 20th century, radio beacons and satellite networks allowed aircraft and ships to determine their position.

youdao