That was confirmed in the early 1990s by the American Magellan orbiter which used radar to peer through the planet's thick clouds and mapped out a rich, varied and dynamic surface.
2019年6月六级真题（第二套）听力 Section C
英英词典释义
Noun
1. Portuguese navigator in the service of Spain; he commanded an expedition that was the first to circumnavigate the world (1480-1521)