英語 での Billion years ago の使用例とその 日本語 への翻訳
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Mars' magnetic field turned off four billion years ago.
The oldest known glacial epoch occurred nearly two billion years ago.
The galaxy existed about 12 billion years ago.
The Late Heavy Bombardment ended 3.8 billion years ago.
Our astronauts had landed on the Moon a billion years ago, they.
In rare species, also referred to as a living fossil、2Than billion years ago without changing the appearance inhabit。
Billion years ago, Earth had just managed to evolve multicellular life.
Late Heavy Bombardment: a period of orbital instability that occurred in our solar system approximately 4 billion years ago.
They found that the volcanic activity peaked about 3.5 billion years ago, which was when the atmosphere was at its thickest.
Since the appearance of life, about 4 billion years ago, never has a single species changed the global ecology all by itself.
Beginning nearly five billion years ago, there is no sign of our beautiful blue planet in the….
Billion years ago, something happened which we call the Big Bang.
Five billion years ago, this star was very similar to the Sun as it is today.
It was 211 that the fishes appeared in the sea 13.2 billion years after the'big bang' which was 0.5 billion years ago.
Venus may also have had a lot of water in the past. Several billion years ago, the solar system may have briefly hosted 3 blue planets.
But then, five billion years ago, dark energy got the upper hand.
Two Billion years ago a gigantic meteor of Graphite hit Southern Africa and has been protected by the Bantu Tribes for centuries.
The Big Bang is on the left, 13.7 billion years ago.
Platinum was incidentally brought to earth by a meteorite around 2 billion years ago.
The closest galaxies seen in the foreground emitted their observed light about a billion years ago.