ejecta

简明释义

英[ɪˈdʒektə]美[ɪˈdʒektə]

n. 喷出物；排泄物

英英释义

单词用法

同义词

反义词

例句

1.During the October 6, 2008 flyby of Mercury, MESSENGER's NAC captured a new view of the bright, radial ejecta rays of Kuiper crater that were previously imaged by Mariner 10 at a lower Sun Angle.

2008年10月6号飞越中的“信使号”用窄角镜头拍下了明亮呈放射状的柯伊伯陨石坑，“水手10号”曾在阳光斜射时拍摄这一区域。

2.But the nearly six-mile high ejecta blanket that breaks lunar altitude records was formed in a matter of minutes!

但是打破月球高度记录的将近六英里高的喷溅覆盖物在几分钟内就形成了！

3.The ejecta surrounding the lunar crater is just what one would expect from an explosion ejecting a large volume of dust, soil, and boulders.

围绕在月球陨石坑周围的喷出物，正是人们所能预料到的在一次爆炸中能得到的物质，爆炸喷发出大量灰尘、土壤和岩石。

4.Explosive impacts heated and liquefied the ice, resulting in the fluid appearance of the ejecta.

爆炸性的撞击使冰加热并液化，导致喷出物呈流体状。

5.The study of thermal activity and volcanic ejecta in terms of thermal radiation data and the combination of remote sensing and other techniques is presented.

使用热辐射数据以及将遥感与其它技术相结合能够研究火山区的热活动和火山喷发物。

6.This and the X-ray spectrum, which exhibits a high concentration of iron atoms relative to oxygen and silicon, convincingly show that the ejecta are the remains of an exploded white dwarf star.

这幅图连带X射线光谱（显示出了铁相对氧与硅的高度集中）令人信服地说明，抛出的物质是爆发白矮星的残余。

7.According to the shock theory, the ejecta produced by explosion form the pressure pulse, and it spreads in forms of either compression waves or expansion waves.

根据激波理论，爆炸产生压力脉冲并以压力波的形式传播，既有压缩波也有膨胀波。

8.The volcanic eruption produced a significant amount of ejecta, including ash and lava fragments.

火山喷发产生了大量的喷出物，包括灰烬和熔岩碎片。

9.Scientists study the ejecta from meteor impacts to learn about the composition of celestial bodies.

科学家研究来自陨石撞击的喷出物以了解天体的成分。

10.The crater was filled with ejecta that had been thrown out during the explosion.

这个陨石坑里充满了在爆炸中被抛出的喷出物。

11.During the experiment, the ejecta were collected for further analysis.

在实验过程中，喷出物被收集以便进一步分析。

12.The lunar ejecta provides important clues about the moon's geological history.

月球的喷出物提供了关于月球地质历史的重要线索。

作文

The study of planetary geology often leads us to fascinating phenomena that occur on celestial bodies. One such phenomenon is the presence of ejecta, which refers to the material that is expelled during explosive volcanic eruptions or impacts from meteoroids. Understanding ejecta is crucial for scientists as it provides insights into the geological history and processes of various planets, including Earth, the Moon, and Mars. When a meteorite strikes a planet's surface, it can create a crater and launch debris into the surrounding area. This debris is known as ejecta. The composition and distribution of ejecta can tell researchers a lot about the impact event itself, such as the size of the meteorite and the speed at which it struck. For instance, on the Moon, the vast plains known as maria are largely composed of basaltic ejecta from ancient volcanic activity. By analyzing these materials, scientists can reconstruct the Moon's volcanic history and understand how it has changed over billions of years. Similarly, on Mars, the study of ejecta from impact craters has revealed clues about the planet's past environment. Some craters show signs of having been formed by water-rich impacts, while others contain minerals that indicate volcanic activity. The diversity of ejecta found in these craters helps scientists piece together a more complete picture of Mars' geological evolution and its potential to support life. In addition to impacts, ejecta also plays a significant role in understanding volcanic activity. When volcanoes erupt, they can expel ash, gas, and larger rock fragments into the atmosphere. This volcanic ejecta can travel great distances, affecting climate and air quality far from the eruption site. For example, the eruption of Mount St. Helens in 1980 produced a massive amount of ejecta, which had devastating effects on the surrounding ecosystem and altered weather patterns across the region. Studying ejecta not only helps scientists learn about past events but also aids in predicting future geological activity. By monitoring areas with high levels of ejecta deposits, researchers can identify regions that may be at risk for future eruptions or impacts. This knowledge is vital for disaster preparedness and can save lives by providing early warnings to communities at risk. In conclusion, ejecta serves as a window into the dynamic processes that shape our planet and others in the solar system. Whether through the lens of impact craters or volcanic eruptions, the study of ejecta reveals critical information about the history and evolution of celestial bodies. As technology advances, scientists will continue to uncover the mysteries held within ejecta, enhancing our understanding of the universe and our place within it.

行星地质学的研究常常引导我们探索在天体上发生的迷人现象。其中一个现象是存在的喷发物，指的是在爆炸性火山喷发或陨石撞击过程中被排出的物质。理解喷发物对于科学家来说至关重要，因为它提供了关于各个行星（包括地球、月球和火星）的地质历史和过程的见解。 当一颗陨石撞击行星表面时，它可以形成一个坑并将碎片抛向周围区域。这些碎片被称为喷发物。喷发物的成分和分布可以告诉研究人员很多关于撞击事件本身的信息，例如陨石的大小和撞击速度。例如，在月球上，被称为玛利亚的广阔平原主要由古代火山活动产生的玄武岩喷发物组成。通过分析这些材料，科学家可以重建月球的火山历史，并理解它在数十亿年间如何变化。 同样，在火星上，研究冲击坑的喷发物揭示了关于该行星过去环境的线索。一些陨石坑显示出曾经是水丰富的撞击形成的迹象，而另一些则包含表明火山活动的矿物。这些陨石坑中发现的喷发物的多样性帮助科学家拼凑出火星地质演化的更完整图景，以及其支持生命的潜力。 除了撞击，喷发物在理解火山活动中也发挥着重要作用。当火山喷发时，它们可以将灰烬、气体和更大的岩石碎片排入大气中。这种火山喷发物可以传播很远，影响远离喷发地点的气候和空气质量。例如，1980年圣海伦斯山的喷发产生了大量的喷发物，对周围生态系统造成了毁灭性影响，并改变了该地区的天气模式。 研究喷发物不仅有助于科学家了解过去的事件，还有助于预测未来的地质活动。通过监测高水平的喷发物沉积物的区域，研究人员可以识别可能面临未来喷发或撞击风险的地区。这一知识对于灾害准备至关重要，可以通过向处于风险中的社区提供早期警告来挽救生命。 总之，喷发物作为我们星球和其他太阳系天体动态过程的窗口。无论是通过冲击坑还是火山喷发的视角，喷发物的研究揭示了关于天体历史和演变的重要信息。随着技术的进步，科学家将继续揭开喷发物中蕴藏的奥秘，增强我们对宇宙及我们在其中位置的理解。