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Human rights
Fundamental and universal rights and freedoms to which all human beings are entitled. They consist of civil, political, economic, social and cultural rights that States are obliged to fully respect according to common standards ratified by national and international legislation.
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兩栖類
Archaeology; Evolution
包含的類的脊椎動物的青蛙、 蟾蜍、 螈和蜥蜴。在泥盆紀 (約 3.7 億年前) 作為佔用土地的第一次脊椎動物進化的兩棲動物。他們有潮濕無鱗的皮膚，用來補充肺臟的氣體交換的 。的蛋都軟，容易乾燥，因此繁殖通常發生在水中。兩栖類幼蟲水生，，用鰓呼吸 ； 他們接受變態到成人的表單。在潮濕的環境中找到大多數兩栖類和它們發生除南極洲以外的所有大陸。 ...
