21£®China and the other countries are frank with each other at the United Nation Climate Conference is South Africa. That is makes a better environment hopeful.
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22£®—It’s the classroom! So you know smoking is by no means allowed.
—Sorry.
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23£®Per capita£¨È˾ùµÄ£©income in the North Korea is about 5 percent of in the South Korea.
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24£®The ability to store knowledge makes computers different from every other machine invented.
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