查询词典 asteroid

Those satellites travel at 3.07 kilometres a second (1.9 miles), at up to 35,880 kilometres above earth -- and the Apophis asteroid will pass by earth at a distance of 32,500 kilometres.

这些卫星位于地球上方3.588万公里，运行速度为每秒3.07公里，而阿波菲斯行星则预计将在距离地球3.25万公里的地方经过。

Now two studies published in the journal Nature suggest that notion may be all wet. Because at least one asteroid appears to be coated by a thin layer of ice. And just that kind of asteroidal frosting could have been the source of our water here on Earth.

现在，《自然》杂志发表的两项研究告诉我们这一观念恐怕是大错特错的，因为我们至少已发现了一颗小行星表面覆盖着一层薄冰，而且只有这种小行星结霜有可能是地球上水的来源。

Among the other worlds orbiting Bespin's star are Miser, Orin and the Velser's Ring asteroid belt.

其他围绕贝斯平的恒星旋转的星球是米瑟、奥林和维尔瑟的环状小行星带。

Formed by the impact of a large asteroid or comet, Caloris is one of the largest, and perhaps one of the youngest, basins in the Solar System.

卡勒瑞斯是由于一个大型的小行星或者是彗星的影响而构成的，是太阳系中最大，也可能是最年轻的盆地之一。

If you insist on worrying about the global economy, better to get riled up about a Chinese economy showing signs of overheating, North Korea's missile-happy regime, or a killer asteroid careering toward the planet unbeknownst to us all.

如果说仍难以消除对全球经济的担忧，就应将更多注意力转向中国经济发展中出现的经济过热迹象、朝鲜的导弹威胁以及其他无法预知因素。

According to this scenario, researchers could never find evidence of such early chondrules because all these objects would have been destroyed by the melting of the chondritic asteroid s into which they accreted.

在这个情形下，研究人员恐怕永远也无法找到如此早期的球粒证据，因为所有这些物体在聚合的过程中，都会因为球粒陨石小行星熔化而被破坏。

As the Earth-bound scientists toil, Rosetta itself will continue to zoom across our Solar System, next swooping again by the Earth in 2009 November, flying by asteroid 21 Lutetia in 2010 July, and finally landing on comet Churyumov-Gerasimenko in 2014 November.

当科学家在忙碌的同时，罗塞塔号也将继续在太阳系中飞驰，预定于2009年11月越过地球、2010年7月飞越小行星21Lutetia ，并于2014年11月最终降落在 Churyumov-Gerasimenko 彗星之上。

Abundance of salt-alkaline megatherm Classopollis-Ephedripites assemblage in a limited time illustrates a short duration of dry hot climate by latest Cretaceous. Such extreme climatic change and ecologic overturn are possible causes of the dinosaur extinction in the study area. Other factors, such as asteroid impact and large volcanic eruption triggering global mass extinction caused the regional climate change.

嘉荫群上部渔亮子组中膏岩层和耐高温、抗盐碱的克拉梭粉-麻黄粉组合在短时间内的大量出现，说明晚白垩世末期出现有短暂的干热气候，这种气候的突然转变以及伴随的生态系统的紊乱可能是嘉荫地区恐龙大量死亡的重要原因，但不排除诸如天外星体碰撞地球、大规模火山喷发等引发白垩纪末恐龙全球灭绝的因素，后者更可能是引起气候变化的直接因素。

As to what happened to the Palaeocene fauna, the evidence points not towards an errant asteroid but to a giant burp from the oceans, which released a huge amount of methane.

至于古新世时代末期动物群到底发生了什么致使它们灭绝，有证据指出这是海洋的一个惊涛骇浪所散发出的大量甲烷气体所致使的，而并没有提到所谓的偏轨行星。

A wilder offshoot of this theory, called panspermia, suggests that whole bacteria life itself first evolved on Mars and then hitched a ride to Earth via small pieces of the Red Planet blasted here by asteroid or comet impacts.

Panspermia 是这派之想像力特别丰富的，他们的意见：细菌根本是发源於火星；小行星或大陨石的撞击把火星的碎片带到了地球。

According to our present broadcasting situation,the thesis proposes using new technology to update and reform the present HFC. It also suggests broadcasting using self-advantage and arranging EPON in order to win the supermarket.

论文从我国广电的现状出发，结合实际，积极倡导采用新技术更新、改造我国现有的HFC网络；倡导广电现阶段利用自身优势，部署EPON网络来赢取市场。

A new general kinetic equation was derived in which the effect of the removal of condensation water was taken into account completely, and was applied to the polyesterification kinetic study of AA/HPHP and AA/NPG. It was found that the reaction order of self-catalyzed polyesterification was not constant. For these polyesterifications, the reaction order was 2.5 at a low temperature, while 3.0 at a high temperature.

考虑缩合水的排除对反应体系的影响，用体积浓度单位推导出一个新的聚酯反应总包动力学方程，并应用到AA/HPHP和AA/NPG两个聚酯化反应的动力学研究中，研究发现，自催化聚酯反应的反应级数并不是固定值，对于AA/HPHP和AA/NPG两个聚酯化反应而言，低温时反应级数为2.5，高温时反应级数为3.0。