2--Vegetables don't have any blood in them... And who is squeezing turnips?
 
1--Let's see if we can figure out what it means...
 
2--Hey, Can you loan me $50.00, I can pay you back on Friday.
 
1--I wish I could help, but I don't have any money....
 
2--Are you sure? I really need it.
 
1--I understand, but you can't squeeze blood out of turnip.
 
2--You can't squeeze blood from a turnip means you cannot get something from a person that they don't have to give you.
 
1--And it's used about money.
 
2--You see, it actually makes sense, because no matter how hard you squeeze a turnip, it will never bleed.
 
1--and if somebody does not have any money to give you, you'll never be able to get it.
 
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注解：
 
1.squeeze挤压 
2.loan借出  
3.actually事实上 

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译文：

1--比如有人说：你不能从萝卜里挤出血。（squeeze blood out of turnip）
2--蔬菜可没有血……那谁又在压榨萝卜呢？
1--让我们来听听，能否明白这个短语的意思……
2--嘿，你能借我50刀么，我周五就还你的。
1--我真的希望能帮助你，但是我确实没有钱……
2--你确定？我真的很需要。
1--我明白，但是你不可能从萝卜里挤出血啊。（squeeze blood out of turnip）
2--你不能从萝卜里挤出血的意思是你不能从某人那里得到他们压根就没有的东西。
1--这个短语用于钱财方面。
2--大家看，其实也很好明白的，因为不论你怎么压榨萝卜，它也不会流血。
1--所以如果某人没有钱给你，你永远也得不到。