You bet. —(informal)你说的没错。= Of course; Surely.当然；的确。 

　　为什么当老外说， “You bet.” 的时候，就代表你说的一点也没错的意思呢？因为 bet 是下赌注的意思，所以 “You bet.”就是指， “You can bet money on that.” (你可以把钱下注在上面。)，言下之意，就是说这件事百分之百正确。例如别人问你， “Is this the way to the Summer Palace?” (这是去颐和园的路吗？) 你就可以回答说， “You bet.” (一点也没错。) 

You bet ：当然, 真的, 的确，肯定地,没问题.
 
例句与用法: 
1. You bet it is. 
 一定是这样。  
2. They won't make it, you bet. 
 他们肯定办不成。 
3. "Were you frightened by that bull? " "Frightened? You bet I was; I was scared out of skin! " 
 "那头公牛把你吓坏了吧？""吓坏了？的确是吓坏了；我被吓得魂不附体了！"