英文.....請問這裡up和out的用法?

Sorry, may I ask a question..
this sentense:
"Isn't it cold up there?"
Why do we use "up" in this sentense?

And second question:
"I don't want to run into bears out in the wilderness."
Why is there a word "out" in this sentense?

thanks very much..
更新: Thanks... You two's answers are really good...but about "out", I don't know which one is right? Really confused...@@" But still thanks very very much, really kind help!
2 個解答 2