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one of the world's most important wetlands
provide wildlife with food and cover/provide food and cover for wildlife
                        go there only for a short stay
                make laws to prevent all these things
not many types of cranes left
keep doing sth.
 invite them to help us
changes in their numbers
be active in the daytime
使湿地更小
为了做某事
因此
一年到头
理解湿地的重要性
给野生生物越来越少的空间
lead to
in order to
the importance of
food and cover
East China
     all year round
a short stay
95 per cent of
made laws
fishing
count and describe
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