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As the sun rises and sets again.our visit is now finally at an end.During the past days,i gianed and understood a lot.There are following two topics i am interesteed in mostly.

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above all ,i want to say the environment.In China,i often heard that people in America are always think very highly of the environment.it is no doubt that both in Washington and New York,wether the economic center or political center，we are able to see the blue sky, the white cloud and the golden sunshine,to hear the birds' fluent singing,to smell the flowers' overflowing fragrance.

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As big cities ,we can't see such the clean sky in China but in America.So environmental protection is imminent.

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However, as far as i am concerned ,in some place,Americans do not have such  a strong sense of environmental protection.What makes me have this pointis that in our host family,they often use plasic fork and knife and paper plates which can't be recycled.

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Although they often use things can't be recycled ,they are able to do a good job of sorting and degrading garbage.That's why they could still do well in environmental protection.What we can do is making best use of the advantages and bypass the disadvantages.

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The second one is "self-discipline".Americans are highly qualified which are caused by their self-discipline,they are always polite and notice their behavior everytime.They disciplined themselves out of their hearts like a common habit is one of the factors why Ameica is not only the world power but also a cultural strong country all over the word.

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their self-discipline can also be discovered in American students study time. they extremely depend on their teachers but study on their own so that they can make full use of their brain and imagination which make them more creative to create much more new high-tech product.we still have far distance to chase them.all of youths have a sense of abilities to solve the problem of environmental protection.

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There are lots of things and challenges that we need to do our best to dig in and conquer.Trust ourselvesthat we will never stop our steps.