Morphology: Comet-shaped mass with "tail" in collapsed SLS and "head" in posterior SMS.

形态：彗星状肿块，尾部位于塌陷的舌下间隙，头部位于下颌下间隙的后方。

youdao

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

I look up the sky; one comet passed over my head, then disappeared, and left no trace.

我仰望天空，一颗流星从我的头顶划过，没有痕迹。

youdao

Many such quartets blaze like a comet across the sky and then disappear before you can turn your head.

NPR: The Jupiter String Quartet: Orbiting Perfection

The severity of the laboratory test was equivalent to an oblique collision with the rocky surface of the Earth - a comet coming in at an angle of less than 25 degrees from the horizon, rather than head on (perpendicular to the Earth's surface).

BBC: Comets could have seeded life on Earth