billion years发音

意思翻译

万亿年

相似词语短语

billion sudoku───十亿数独

years───n.[天]年；年龄；岁月；年代

billion vegans───十亿素食者

billion dollars───十亿美元

billion of───十亿

years and years───一年又一年

gardenless years───无园岁月

former years───往年；前些年；前几年

years aog───年后

双语使用场景

How could it be after four and a half billion years?───怎么可能是在45亿年之后呢？

These rocks have been dated radiometrically at two billion years old.───辐射能探测，这些岩石形成于20亿年前。

The stars must have formed 10 to 15 billion years ago.───这些恒星一定形成于100亿至150亿年前。

Why not copy these proven models, the engineers wondered, rather than trying to outguess 4 billion years of natural selection?───工程师想知道为什么不复制这些行之有效的生物原型，而偏偏费力地去猜测40亿年的自然选择。

The new studies tackle a more fundamental question: How much water did the moon contain inside when it formed, 4. 5 billion years ago?───新的研究落足于一个更为根本的问题：45亿年前，月球形成时其内部含有多少水分？

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.───改进后的未来时钟准确度将提高到320亿年一秒的误差——高出宇宙年龄的两倍多。

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，科学家还坚信未来太阳将会膨胀，吞噬地球，但泰坦则会变得暖和而条件宜人。

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将能观测到300万年前最早的恒星的构成，这一时刻被称为“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.───这个模拟场景追踪了46亿多年来太阳的兄弟姐妹穿过银河系旋臂时的轨迹。

英语使用场景

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.