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Because the deep ocean offered a stable environment protected from harmful radiation and cosmic impacts.
JLPT EIKEN-PRE1 • READING
Because the deep ocean offered a stable environment protected from harmful radiation and cosmic impacts.
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练习问题
Because shallow tide pools lacked any mineral deposits or gases.
Because the deep ocean offered a stable environment protected from harmful radiation and cosmic impacts.
Because the deep ocean floor received faint but crucial amounts of ultraviolet light.
Because early land-based predators could not swim to the deep seafloor.
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