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it used to live in the arctic area only. it lived in Siberia long ago. it is extinct today. it is a long-haired mammal.
A worm. A shark. An elephant. A human ancestor.
it used to live in the arctic area only. it lived in Siberia long ago. it is extinct today. it is a long-haired mammal.
An argument against a popular concept. An explanation of a specific topic. A description of a phenomenon. An account of something happening.
Very different environments can favor fossilization. There are few environments in which fossils are protected. Environments that favor fossilization have similar climates. Environments that favor fossilization support large populations of animals.
Re1=Re2 Re1=0.5Re2 Re1=1.5Re2 Re1=2Re2
An argument against a popular concept. An explanation of a specific topic. A description of a phenomenon. An account of something happening.
Re粗：Re细=2：1 Re粗：Re细=1：1 Re粗：Re细=1：2 Re粗：Re细=1：4
Re1=Re2 Re1=0.5Re2 Re1=1.5Re2 Re1=2Re2
Re1=0.5Re2 Re1=Re2 Re1=1.5Re2 Re1=2Re2
Re1=0.5Re2 Re1=Re2 Re1=1.5Re2 Re1=2Re2
A worm. A shark. An elephant. A human ancestor.
in a deep lake. covered by sediment. protected by oil. buried slowly.
Re1=Re2 Re1=0.5Re2 Re1=1.5Re2 Re1=2Re2
Re1=0.5Re2 Re1=Re2 Re1=1.5Re2 Re1=2Re2
Re1=0.5Re2 Re1=Re2 Re1=1.5Re2 Re1=2Re2
in a deep lake. covered by sediment. protected by oil. buried slowly.
Re1=Re2 Re1=0.5Re2 Re1=1.5Re2 Re1=2Re2
Re粗：Re细=2：1 Re粗：Re细=1：1 Re粗：Re细=1：2 Re粗：Re细=1：4
Re1=0.5Re2 Re1=Re2 Re1=1.5Re2 Re1=2Re2
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