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geocentric dust cloud 地心尘土云
See that dust cloud disappear without a trace. 看到乌云消失得无影无踪。
The meteorite might have caused a huge dust cloud. 陨星可引起巨大的尘埃云。
Earth had encountered a dust cloud much as Mariner 4 had done years earlier. 地球遭遇了类似玛瑞纳4号早些年遭遇的尘埃云团。
Moments before sunset, a dust cloud settles slowly around tall saguaros after a violent windstorm in Sonora, Mexico. 在墨西哥索诺拉州一场风暴后的日落前瞬间,一团尘雾缓缓萦绕着高大的仙人掌树。
Landgraf believes this dust cloud could be an important signpost in the search for other planets and life. 但它们现在仍然聚在太阳系周边的事实说明，其正在以每秒钟50吨的速度得到替换，天文学家称，它们是不停地由行星、彗星以及小行星碰撞产生的太空灰尘得到替换的。
A dark, obscuring dust cloud, the simple, sculpted shape of the Cone Nebula is near the lower left edge. 黑暗、模糊的尘埃云，形状简单的锥形星云位于影像左下边缘附近。
The rotation of the original gas and dust cloud becomes the revolutions of the planets around the Sun and the rotation of the Sun itself. 气体尘埃云原先的转动,成了行星公转和太阳自转的原动力。
Koong had taken over a lightstation in the dark dust cloud, and was purposely crashing ships in order to salvage the wrecks. 在那片昏暗的尘云里，孔占据了一座灯塔太空站。他故意使往来的飞船坠毁，从而回收它们的残骸。
He agrees with other scientists that the dust cloud later cooled and blocked out the sun, but says the land dinosaurs were already history by that time. 他同意其他科学家的观点：随后尘埃云团变冷，阻挡了阳光。但是他认为那个时候陆生恐龙已经成为历史了。
Hurtling through a cosmic dust cloud a mere 400 light-years away, the Pleiades or Seven Sisters star cluster is well-known for its striking blue reflection nebulae. 它们之前只相隔了400光年的宇宙尘埃，众所周知，昴宿星团或七姐妹星团中含后众多的蓝色反射星云。
Governor Koong of Roon was eager for an alliance with the Empire, and invited Screed to his profitable salvage operation within the Cloak of the Sith dust cloud. 鲁恩星的孔总督渴望与帝国结盟。他邀请斯克里德参观他的回收厂。这家回收厂位于“西斯之蓬”星际尘云内，为孔带来了丰厚的利润。
The false color image spans about 1 degree or seven light-years at the distance of the Pleiades, with the densest regions of the dust cloud shown in yellow and red hues. 这张假彩色影像在天空中覆盖大约1度，也就是说在昴星团内横跨7光年，在影像中黄色和红色部分是尘埃中最致密的区域。
On the right marked by red gas and dust clouds, is irregular galaxy M82. 而在右侧有着红色气体和尘埃云的就是不规则星系M82。
Experiments show that the different compositions make different ignition delay time, and their effects are remarkable on the maximum velocity of pressure rise and related research of dust cloud. 实验证明，点火药头药剂不同，其化学点火具的点火延迟时间不同，对粉尘云的最大压力上升速率及相关研究结果的影响十分显著。
A cloud is a mass of vapor in the sky. 云是天空中的水汽团。
About 1,000 light-years across, the twisted cosmic dust cloud apparently shaped like a parallelogram is likely the result of a smaller spiral galaxy falling into the giant Centaurus A. 影像中这个扭曲的宇宙尘埃云，大小约有一千光年，外观很像一个平行四边形，它很可能是一个小星系掉进半人马座A后所形成的。
Explanation: Hurtling through a cosmic dust cloud a mere 400 light-years away, the lovely Pleiades or Seven Sisters star cluster is well-known for its striking blue reflection nebulae. 说明：穿梭在距离我们大约400光年远的尘埃星云内，可爱的昴星团/七姐妹星团以其显著的蓝色反射星云而得名。
Their winds and radiation sweep out an interstellar cavern in the gas and dust cloud about 200 light-years across, triggering star formation and sculpting the region's dense inner edge. 星团风和辐射横扫了约200光年宽的处于气体和尘埃之中的星际洞穴，从而引发恒星的形成并使得该区域的内边缘非常厚密。
Probably less than 500 light-years away and effectively blocking light from more distant, background stars in the Milky Way, the densest part of the dust cloud is about 8 light-years long. 尘埃云的致密部分大约有8光年长，距离我们不到500光年远，并且有效地阻挡了我们银河系遥远背景恒星发出的星光。