2-- The mangoes are on sale today.
 
1-- What exactly are mangoes?
 
2-- They have yellowish red skin. It's a fruit with one big seed.
 
1-- Is the seed edible?
 
2-- Maybe if you were a parrot. I wouldn't recommend it.
 
1-- How much does a mango cost?
 
2-- Normally, they're $2 each. Today, they're only $1 each.
 
1-- Maybe I won't like the taste.
 
2-- It's hard to describe. They're sweet, but also sort of acidity.
 
1-- How do I tell the difference between a ripe one and an unripe one?
 
2-- They're similar to an avocado. When the outside feels soft, they're ripe.
 
1-- Where do most of them come from?
 
2-- These are from Mexico.
 
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注解：
 
1.on sale打折  
2.edible可食用的       
3.acidity酸味   

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译文：

1--能告诉我这里有没有在打折的食物？
2--今天芒果打折。
1--芒果具体是什么样的？
2--他们有黄红色的外皮。是一种中间有种子的水果。
1--种子能吃吗？
2--也许如果你不是真的想买，我就不该给你推荐了。
1--一个芒果多少钱？
2--它们通常是2美元一个。今天，它们一个只要一元。
1--或许我不是很喜欢芒果的味道。
2--这个很难描述。它们很甜，但是会有点酸。
1--我怎么知道哪个是熟了的，哪个是没有熟的？
2--它和鳄梨有点像。当外皮变软了，它们就成熟了。
1--它们大多产自哪里？
2--它们产自墨西哥。