Arrow: Printing fault in gravure which appears as a mark in the shape of an arrow head on the print. Also called comet.

箭形印记：是照相凹版印刷的瑕疵。印刷品上带有像箭头的印纹。亦称慧星印记。

youdao

The single cell gel electrophoresis(SCGE), also called comet assay, is a sensitive and rapid method for DNA damage detection in individual mammalian cell.

前言： 单细胞凝胶电泳是一种在单细胞水平检测哺乳类有核细胞DNA 断裂的新技术。

youdao