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Earth 101 | National Geographic
학습 통계
CEFR 레벨
난이도
자막 (58 세그먼트)
- [Narrator] Earth, the only planet known to maintain life.
A product of scientific phenomena and sheer chance.
This blue speck in space holds the past,
present, and future, of our very existence.
(instrumental music)
Approximately 4.5 billion years ago,
the Earth formed from particles left over
from the creation of our sun.
Gravity drew these particles together
to form pebbles which then formed boulders,
and eventually, the Earth.
At its heart is a solid inner core
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