查询词典 asteroid

New research challenges the idea that the asteroid impact that killed the dinosaurs also sparked a global firestorm.

新的研究结果挑战了小行星撞击导致恐龙灭绝并引起全球大爆炸的理论。

Propelling a fusillade of cannonball-size steel spheres at an approaching asteroid.

发射一连串如炮弹大小的钢球去撞击来袭的小行星。

Faced with such diplomatic gamesmanship, some greens may now hope that an asteroid-type warning appears on the radar screen.

面对这样的外交策略，一些绿色团体现在希望一种小行星来袭式的警告能够显现在雷达屏幕上。

Prior to the giant planet killer asteroid, several hundred smaller ones travelling on the exact same trajectory always precede it, giving us ample warning by striking the Earth 3 weeks ahead of time even though we're in a totally different position in our orbit.

在这巨大的杀手级小行星前，数百颗同样轨道的小碎片总是领先它，在三个星期前给予人类充份的预警时间，尽管地球还在撞击轨道前的位置上。

In the case of the demise of the dinosaurs, scientists have a smoking gun, an impact crater that suggests dinosaurs were wiped out as the result of a large asteroid crashing into the planet.

至於灭亡的恐龙，科学家们有一个冒烟的枪，一个撞击坑表明恐龙的灭绝是由於一个大的小行星撞击地球。

It has no secular energy error for the integration of periodic orbits with constant time-steps. The upper bound of mass was given for an imaginary planet in the main asteroid belt with this scheme.

演化模型是太阳系N体模型(N=7)，即把水星、金星、地球的质量加到太阳上，忽略冥王星，同时在小行星主带附近增加一个天体，系统演化时间为一亿年。

According to the content of iridium also estimated the impact object is equal to the diameter of 10 km asteroid.

根据铱的含量还推算出撞击物体是相当于直径10公里的一颗小行星。

Based on the scheme of exploration Ivar asteroid, this dissertation studied the mission planning technology and system design.

本文基于探测Ivar小行星的设计方案，对深空探测器自主任务规划方法和系统设计进行了研究。

Finally, taking the asteroid Ivar (numbered 1627) rendezvous mission as example, the results of methods are verified and investigated.

以1627 Ivar小行星的交会任务为例验证了该方法，其结果表明，采用混合搜索方法可以快速获得最优的星际转移发射机会。

A a graph choose 2 show where are those asteroid located, I selected the 2 point on the same orbit as Jupitor, one before, one after. Please check google for background information. Google mentions some 60 degree before and after something

第一个长段子由于失误没有听懂，是天文学方面的，大意是发现了一些宇宙里新的物质，和comet很象，但是宇宙里面有百万计的comet，以至于科学家很难identify这些新物质。

Must have Coordination and negotiation skill, flexible ideas, and be punctilious person.

必须具备较好的协调与谈判能力，头脑灵活，工作认真仔细

Result: 18 patients are all with simple eye.The pigment mole lies in nasal and temple sides of the ball conjunctiva,in which 2 lie in lacrimal caruncle and semilunar plica.

结果：18例患者均为单眼，色素痣大多数位于内外侧睑裂部球结膜面，2例位于泪阜及半月皱襞，经激光治疗后，10例色素痣消失，有5例行再次激光后消失，2例行第三次激光后消失，1例第四次激光后消失。