expedition和exploration区别？

expedition

n. 远征,探险队,迅速
He is the commander of the expedition.
他是远征军的司令/探险队的队长。

exploration

n. 探险,踏勘,探测
It is true during their explorations they often faced difficulties and dangers of the most perilous nature.
确实在探险中，他们经常面临着各种最有危险性的艰难和险阻。