comet

n.

[天]彗星；孛；

复数：comets

halley's comet[天]哈雷彗星

1. That comet is invisible to the unaided eye.
   那颗彗星只用肉眼是看不到的。
2. Comets move around the sun like planets, but in long oval course.
   彗星象行星一样绕太阳运转，然而其轨道呈狭长的椭圆形。

COMET P/20
Comet 81P/Wild 2 under a microscope.
The comet assay for DNA damage and repair
Comet Observations [245 Spitzer Space Telescope]
A comet model. I. The acceleration of Comet Encke
Deep Impact: Excavating Comet Tempel 1
COMET: a proposed mechanism of action to explain the results and concerns about dose.
Mineralogy and petrology of comet 81P/Wild 2 nucleus samples.
Contemporary issues in toxicology the role of metabonomics in toxicology and its evaluation by the COMET project
A comparison of baseline and induced DNA damage in human spermatozoa from fertile and infertile men, using a modified comet assay.