1.
The central portion of the head of a comet.
彗核彗星头部的中心部分
2.
The nebulous, luminescent cloud containing the nucleus and constituting the major portion of the head of a comet.
彗发星云状的发光云体包括彗核、彗星头部的重要部分
3.
The collision of 21 comet nuclei will last for five and a half days.
二十一颗彗核撞击时间持续五天半。
4.
For all the fiery display it makes in the sky, the nucleus of a comet is relatively small.
尽管彗星在天空中显得光彩夺目，但彗核相对来说是较小的。
5.
Fascinated sky enthusiasts in the Earth's northern hemisphere were treated to an instantly visible comet head and a faint elongated tail near sunrise and sunset.
北半球的众多天文迷在黄昏和清晨争睹这颗拥有肉眼可见的彗核以及细长的彗尾的彗星。
6.
The head of the comet remains quite bright and easily visible to even city observers without any optical aide.
彗星的彗核仍然非常明亮，因此不需藉助任何设备，用肉眼就可以看到。
7.
According to astronomy experts of the Zijin Mountain Astronomical Observatory, the speed at the time of collision between the 21 nuclei and Jupiter will be as high as 60 km/s.
据紫金山天文台的天文专家介绍，这颗彗星的二十一颗彗核与木星碰撞时的速度高达每秒六十公里。
8.
Detection of Nuclear DNA Degradation of the Skeletal Muscle Cells of Rat at Postmortem Interval by Comet Assay;
大鼠死后骨骼肌细胞核DNA降解的彗星电泳检测
9.
An Experimental Study on the Relationship between the Nuclear DNA Content in Rabbit s Liver Cells and the Postmortem Interval by Using Improved Comet Assay;
改良彗星试验检测兔死后肝细胞核DNA含量变化及其法医学意义
10.
comet of Neptune family
海(王)族彗(星)
11.
a comet's nucleus is a conglomerate of frozen material, mainly methane, ammonia and water, having meteoric particles and dust emBedded in it.
彗星的核是一团冻结的物质，主要有甲烷、氨和水，里面还含有流星微粒和尘埃。
12.
comet finder [ seeker ]
观察彗星用的一种望远镜，寻彗镜
13.
telescopic comet
望远镜观察到的彗星
14.
SHE WORKS FOR COMET AIRLINES.
她在彗星航空公司上班。
15.
Because they found it,
由于他们发现了此彗星，
16.
Schwassman-Wachmann comet
施瓦斯曼－瓦赫曼彗星
17.
When they are farthest away from the sun,
当彗星离太阳最远时，
18.
the track of a storm, comet, satellite
风暴、 彗星、 卫星的路线