billion years

简明释义

1. 10亿年; 2. 十亿年;

英英释义

例句

1.The fossil record suggests life has existed for nearly billion years 十亿年.

化石记录表明，生命存在了近billion years 十亿年。

2.Scientists believe that Earth formed about billion years 十亿年 ago.

科学家认为地球形成于大约billion years 十亿年 前。

3.Geologists study rock formations that are billions of years old, dating back to the early Earth, around billion years 十亿年 ago.

地质学家研究那些已有十亿年历史的岩石形成物，追溯到大约billion years 十亿年 前的早期地球。

4.The universe is estimated to be around billion years 十亿年 old.

宇宙的年龄估计约为billion years 十亿年。

5.Some stars can burn for over billion years 十亿年 before they explode.

一些恒星在爆炸前可以燃烧超过billion years 十亿年。

作文

The concept of time is often difficult for us to grasp, especially when we talk about vast periods such as a billion years. A billion years is an immense duration, far beyond the typical human experience. To put it into perspective, the age of the Earth is estimated to be around 4.5 billion years. This means that our planet has existed for a time frame that is almost incomprehensible to us. In comparison, the average human lifespan is less than a century, making a billion years seem like an eternity. When we consider the history of life on Earth, we realize that it has evolved over billions of years. The first simple organisms appeared about 3.5 billion years ago, and since then, life has undergone tremendous changes. From the emergence of multicellular organisms to the rise of dinosaurs, and eventually to mammals and humans, each stage of evolution took place over millions and even hundreds of millions of years, culminating in the complex ecosystems we see today. In astronomy, a billion years is also an important unit of measurement. Stars are born, live, and die over timescales that can span billions of years. For instance, our Sun is about 4.6 billion years old and is expected to continue shining for another 5 billion years before it exhausts its nuclear fuel and transforms into a red giant. This cycle of stellar evolution is a reminder of the dynamic nature of the universe, where change occurs over such long timescales that it is difficult for us to perceive. Moreover, the study of geology involves understanding processes that take place over billion years. Plate tectonics, erosion, and sedimentation are all natural phenomena that shape our planet's surface over geological time. Mountains rise and erode, continents drift apart, and oceans expand and contract—all of these processes occur over timescales that can be measured in billion years. In the context of climate change, scientists often refer to billion years when discussing the Earth's climate history. By studying ice cores and sediment layers, researchers can reconstruct past climates and understand how they have changed over millions and billions of years. This knowledge helps us to predict future climate scenarios and the potential impacts of human activity on our planet. In conclusion, the term billion years encapsulates a timeframe that is both fascinating and challenging to comprehend. It serves as a reminder of the vastness of geological and astronomical processes, as well as the long history of life on Earth. By appreciating the significance of a billion years, we can better understand our place in the universe and the importance of protecting our planet for future generations.

时间的概念对我们来说往往是难以理解的，尤其是当我们谈论像billion years（十亿年）这样的大段时间时。billion years（十亿年）是一个巨大的持续时间，远远超出了人类的典型经验。为了更好地理解这个概念，地球的年龄估计约为4.5billion years（十亿年）。这意味着我们的星球存在的时间框架几乎是我们无法理解的。相比之下，平均人类寿命不到一个世纪，使得billion years（十亿年）看起来像是一个永恒。 当我们考虑地球上生命的历史时，我们意识到它已经在十亿年间进化。大约3.5billion years（十亿年）前，最早的简单生物出现，从那时起，生命经历了巨大的变化。从多细胞生物的出现到恐龙的崛起，最终到哺乳动物和人类，每个进化阶段都是在数百万甚至数亿年的时间里进行的，最终形成了我们今天看到的复杂生态系统。 在天文学中，billion years（十亿年）也是一个重要的测量单位。恒星的出生、生活和死亡都发生在可以跨越十亿年的时间尺度上。例如，我们的太阳大约有4.6billion years（十亿年）的历史，预计在再继续发光5billion years（十亿年）后，它将耗尽其核燃料并转变为红巨星。恒星演化的这一循环提醒我们宇宙的动态特性，其中变化发生在如此漫长的时间尺度上，以至于我们很难感知。 此外，地质学的研究涉及理解发生在十亿年中的过程。板块构造、侵蚀和沉积都是在地质时间中塑造我们星球表面的自然现象。山脉升起和侵蚀，大陆漂移，海洋扩展和收缩——所有这些过程都发生在可以用billion years（十亿年）来衡量的时间尺度上。 在气候变化的背景下，科学家们在讨论地球气候历史时经常提到billion years（十亿年）。通过研究冰芯和沉积层，研究人员可以重建过去的气候并了解它们在数百万和十亿年间如何变化。这些知识帮助我们预测未来的气候情景以及人类活动对我们星球可能产生的影响。 总之，术语billion years（十亿年）包含了一个既迷人又具有挑战性的时间框架。它提醒我们地质和天文过程的广阔，以及地球上生命的悠久历史。通过欣赏billion years（十亿年）的重要性，我们可以更好地理解我们在宇宙中的位置，以及保护我们星球以惠及未来世代的重要性。