Learner's definition of MANY
—
used to refer to a large number of things or people许多的；很多的 -
She worked hard for many years.她努力工作了许多年。
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They were one of the many, many families that came to watch the parade.许许多多的家庭都来观看游行，他们是其中的一家。
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Gardening is one of her very many interests.园艺是她众多兴趣中的一个。
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They talked about the many benefits of learning English.他们谈论了学习英语的许多好处。
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You can never have too many friends.朋友总是多多益善。
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Some people will come, but many more people will not.有些人会来，但是更多的人不会来。
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A great/good many people [=very many people] did not survive.有很多很多人没有活下来。
—
often used in negative statements常用于否定句
as many
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used to talk about or compare amounts用于谈论或比较数量 -
She read as many books as she could. [=she read the largest number of books possible]她尽可能多地读了一些书。
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She read three times as many books as he did. [=she read three times more books than he did]她读的书是他的三倍多。
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We saw three plays in as many days. [=we saw three plays in three days]我们三天时间里看了三场剧。
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She wrote five books in as many years.她五年时间里写了五本书。
how many
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used to ask or talk about an amount多少（用于询问或谈论数量） -
How many people were there?那里有多少人？
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I was surprised by how many people were there.那里的人数让我感到意外。
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How many times [=how often] do I have to tell you to lock the door?我得告诉你多少遍要锁门呢？
2 many /ˈmɛni/ pronoun
Learner's definition of MANY
: a large number of people or things很多人；很多东西 -
Some people will come, but many [=many people] will not.有些人会来，但很多人不会来。
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The medicine has helped many with the disease.这种药治疗了很多患这种病的人。
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Many of his friends never went to college.他的朋友当中有许多人从未上过大学。
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I know some of the people here, but not (very) many of them.我认识这儿的一些人，但并不多。
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Far/All too many have died in this war.太多的人死于这场战争。
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A lot of people have tried to climb the mountain, but a great/good many of them have failed.不少人试图攀登这座山，但许多人都失败了。
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I wanted a dozen, but they didn't have that many. = They didn't have as many as that. [=they had fewer than a dozen]我想要一打，但他们没有那么多。
as many as
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used to suggest that a number or amount is surprisingly large多达，如此多（用于暗示数量大得惊人） -
She read as many as 60 books!她读的书多达60本！
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As many as 60 students competed for the prize.竞争这个奖项的学生多达60人。
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They lost by as many as 20 points.他们竟然输了20分。
many a/an
formal + literary
—
used with a singular noun to refer to a large number of things or people许多，大量（与单数名词连用，指数量庞大的物或人） -
It remained a mystery for many a year. [=for many years]很多年来，这一直是个谜。
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I've been there many a time. [=many times]我已经到过那儿很多次了。
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Many a tale was told. [=many tales were told]很多故事在流传。
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Many an answer [=many answers] can be found in this book.很多答案可以在这本书中找到。
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Many a man has tried [=many men have tried] but few men have succeeded.很多人尝试过，但几乎无人成功。
many's the
formal + literary
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used to say that something is common or has happened often许多次，常常（用于指有些事情很普通或经常发生）
the many
: the great majority of people大多数人