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Dear,sir
You certainly have reason to believe the subject of the article from which the sentence below is adapted is cliche. But still what's the exact meaning of the sentence?
Americans throw away 80 billion bottles and cans each year, enough to build more than ten stacks to the moon.
Are the bottles and cans piled to form ten layers over the surface of moon as i believe, or are they built one next another from the earth to the moon to-and-fro for more than ten times as the translator believes?
Comments  
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They are built one next to another from the earth to the moon to-and-fro for more than ten times
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Thank you, sir. I think it's why they used the preposition "to". But I'd checked the dictionary, but no entry in the word 'stack' suit this meaning. Could you explain what the word 'stack' means here in the sentence?
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Either of these dictionary definitions will do:

1.a more or less orderly pile or heap: a precariously balanced stack of books; a neat stack of papers.
2.a large, usually conical, circular, or rectangular pile of hay, straw, or the like.
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By the way, which word does 'fro' come from in the structure 'to-and-fro' because I have difficulty remembering it?
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fro "away, backwards," c.1200, North Eng. and Scot. dial. fra, Midlands dial. fro, from O.N. fra "from" (courtesy of the Online Etymology Dictionary).
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Thank you, sir. My fault was about point of view. I get it now. I didn't think the moon is above the earth but paralleled with the earth from a viewpoint say "in the space".
Some stacks.










CJ
Wow. Clever and impressive
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