在 中文 中使用 亿年 的示例及其翻译为 英语
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你知道上一个破亿年是在哪一年吗？?
亿年前，当时还是一个古老的海.
But millions of years ago here was only an ancient sea.来自亿年前!
亿年,一个想法。
亿年前，如果你是碳原子，有几百种分子构型你可以偶然发现。
Four billion years ago, if you were a carbon atom, there were a few hundred molecular configurations you could stumble into.亿年之前，这颗恒星几乎和如今的太阳一模一样，质量也和太阳相等。
Five billion years ago, the star was an almost perfect twin of our sun as it is today, with the same mass.亿年前，二氧化碳激增引发了二叠纪大灭绝，“地球上只有一小部分生命死亡”。
Million years ago a surge of carbon dioxide triggered the Great Permian Extinction, which“ended with all but a sliver of life on Earth dead.”.亿年的宇宙进化被一种轻快、包容的音调所覆盖，这使得宇宙既容易阅读，又能激发智力。
Billion years of cosmic evolution are covered in a light, inclusive tone that makes Cosmos as easy to read as it is intellectually stimulating.亿年前的灭绝是如此戏剧性和广泛的“上演”，科学家称之为“大死”。
The extinction 252 million years ago was so dramatic and widespread that scientists call it“the Great Dying.”.亿年前地球表面曾是一个喧嚣的环境，遭受大量小行星轰击，仍处于形成阶段。
Earth's surface 3.7 billion years ago was a tumultuous place, bombarded by asteroids and still in its formative stages.亿年前每个Y染色体上大约有1400个基因，而现在只剩下45个。
From a peak of 1,400 genes on each Y chromosome approximately three hundred million years ago, there are now only 45 left.亿年前，地球上的某些区域可能有短暂的板块构造活动，但并没普及开来。
Three billion years ago, Earth may have had short-lived plate-tectonic activity in some regions, but it was not widespread yet.亿年前，触须星系的两个成员开始接触，看起来与NGC2207和IC2163相似。
Million years ago, the Antennae began to approach one another, looking similar to NGC 2207 and IC 2163.亿年前地球上的生命面临了最大的生存危机，当时地球大气层从以二氧化碳为主转变为富含氧气。
Life on Earth faced its biggest survival crisis about 2.5 billion years ago when the atmosphere changed from carbon dioxide-dominant to oxygen-rich.亿年前曾猎杀恐龙的现代鳄鱼的“盗骨”祖先的化石在巴西被发现，令研究人员大为震惊。
The fossils of a“bonecrushing” ancestor of the modern-day crocodile that hunted dinosaurs 230 million years ago have been discovered in Brazil, stunning researchers.亿年前含氧光合作用的演变，以及数亿年前陆地植物的出现，已经彻底改变了这个星球。
The evolution of oxygenic photosynthesis 2.4 billion years ago, and the rise of land plants hundreds of million 亿年前，一年有大约400天，一天的长度只有21.8小时。
Million years ago, one 亿年前，物质和能量出现，物理学的开始；之后原子和分子的出现，化学的开始。
Billion years ago, matter and energy appeared to mark the beginning of physics, atoms and molecules appeared to mark the beginning of chemistry.考虑到已经存在100多亿年了，而我们的太阳只有50亿年左右。
It is thought to be less than a billion years old, where our sun is close to 5 亿年前至6500万年前，许多行星的文明完全能够进行空间旅行。
Million years ago to 65 
