billion years的意思

billion years中文翻譯：

萬億年

相似詞語短語

billion sudoku───十億數獨

years───n.[天]年；年齡；歲月；年代

billion vegans───十億素食者

billion dollars───十億美元

billion of───十億

years and years───一年又一年

gardenless years───無園歲月

former years───往年；前些年；前幾年

years aog───年后

雙語使用場景

How could it be after four and a half billion years?───怎么可能是在45億年之后呢？

These rocks have been dated radiometrically at two billion years old.───輻射能探測，這些巖石形成于20億年前。

The stars must have formed 10 to 15 billion years ago.───這些恒星一定形成于100億至150億年前。

Why not copy these proven models, the engineers wondered, rather than trying to outguess 4 billion years of natural selection?───工程師想知道為什么不復制這些行之有效的生物原型，而偏偏費力地去猜測40億年的自然選擇。

The new studies tackle a more fundamental question: How much water did the moon contain inside when it formed, 4. 5 billion years ago?───新的研究落足于一個更為根本的問題：45億年前，月球形成時其內部含有多少水分？

Future clocks that use the new improvements would be accurate to a second every 32 billion years -- more than twice the age of the universe.───改進后的未來時鐘準確度將提高到320億年一秒的誤差——高出宇宙年齡的兩倍多。

Scientists believe that when the Sun swells up in four billion years, swallowing the Earth, conditions could be ideal on a warmer Titan.───此外，科學家還堅信未來太陽將會膨脹，吞噬地球，但泰坦則會變得暖和而條件宜人。

AlMA will be able to see the formation of the very first stars more than 30 billion years ago, a moment known as the cause dawn.───ALMA將能觀測到300萬年前最早的恒星的構成，這一時刻被稱為“宇宙曙光”。

The simulations tracked the sun's siblings as they passed in and out of the galaxy's spiral arms over 4. 6 billion years.───這個模擬場景追蹤了46億多年來太陽的兄弟姐妹穿過銀河系旋臂時的軌跡。

英語使用場景

Current thinking is that some 4 billion years ago, a Mars-sized object smashed into the proto-Earth, knocking off a chunk of planet that eventually formed into the moon.

Mind has waited for 3 billion years on this planet before composing its first string quartet.

Since the Earth began, 4.5 billion years ago, its atmosphere has changed dramatically.

About 4.5 billion years ago a large cloud of gas slowly contracted under gravity into the glowing ball that became the Sun.

For the next billion years, it will keep trying new forms, erupting in whatever crevice or emptiness it can find.

Some 4.4 billion years ago, for example, a Mars-size planetoid seems to have struck our young planet, throwing out enough debris to create our moon.

Over 3 billion years ago, when the climate on Mars was much wetter, a channel breached the crater's rim and carved deep gullies into its sides, leaving behind large fan-shaped alluvial deposits.

Insects appeared about half a billion years ago, but stayed solitary until termites turned up three hundred million years later.

The rocks were formed more than 4 billion years ago.