1 រដូវ
12 ភាគ
Hank describes the desperate need many organisms have for nutrients (specifically nitrogen and phosphorus) and how they go about getting them via the nitrogen and phosphorus cycles.
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S E1 2009 HD
S E7.80 2000 HD
David Attenborough examines the ecological and conservation crises that threaten the world
S E1 2018 HD
S E8.00 2018 HD
S E10.00 2020 HD
S E1 2012 HD
S E1 2009 HD
S E8.50 2006 HD
Earth From Above is a documentary series dedicated to the major challenges faced by our planet, bringing the viewer beautiful High Definition images...
S E9.10 1979 HD
The story of life, from the first primitive cells to the plants and animals that now live around us.
S E1 2009 HD
6.49 2015 HD
5.80 2014 HD
6.37 1996 HD
5.40 2014 HD
4.80 2009 HD
3.60 1947 HD
7.80 2009 HD
4.90 2006 HD
7.41 1962 HD
7.50 2019 HD
បណ្ណាល័យភាពយន្តនិងវីដេអូរបស់យើងអាចត្រូវបានមើលឬទាញយកដោយសមាជិកតែប៉ុណ្ណោះ
បន្តមើលដោយឥតគិតថ្លៃ➞
