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At around 6:00 am every morning, daily life begins for Hainan gibbons. They start their (1)
by their own sounds. Come together at the top of certain trees and give their morning greetings. The special sounds break the (2)
of the forests, suggesting a new day's coming.
Hainan gibbons are one of the (3)
animals in the world. They only live in Hainan Tropical Rainforest National Park(热带雨林国家公园). The park has the country's best rainforest. Now, five families, (4)
36 gibbons, live in the park. But in the 1980s, there were (5)
two families and fewer than 10 gibbons.
(6)
the animals, Hainan has built more than 330 hectares (公顷) of gibbons' living place, and planted around 300, 000 trees. The growing number of the gibbon population in Hainan (7)
China's achievements in environmental protection since 2005.
(8)
protection work continues, it is not easy to see the gibbons till now. They spend their whole life in the trees, (9)
at the top of the trees.
As a result, Chinese scientists are using high﹣tech to solve the problem. Gibbons' special sounds are often seen as (10)
of their own places. So scientists now are recording the sounds and then send them to a computer. The computer can tell and analyze (分析) the sounds of the gibbons to learn more about their lifestyles.