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注意，留心
rubbish
['r?b??]
garbage
['ɡɑ?b?d?]
垃圾，废物
pollution
[p?'lu??n]
污染
explain
[?k'sple?n]
解释
In the market
In the schoolyard
2.What are they talking about?
Picking up garbage
Playing soccer
3.What is the class project about?
Environment.
Pollution
We come from Bayi Middle School.
This is our schoolyard.
My schoolyard looks clean because the students
cleaned it up.What does "clean up "mean?
Look,they are cleaning up the garbage.
But if there is a little garbage.You don't need
to clean up.Just pick it up.
They are cleaning up a yard. (院子)
Maybe it’s their .（校园）
schoolyard