Nevertheless, astronomers still believed that when a comet approached the Sun—where they could study it—the Sun's intense heat would remove the corrupted surface layer, exposing the interior.

尽管如此，天文学家们仍然相信，当一颗彗星接近太阳时——这是他们可以研究它的地方——太阳的高温将会移除损坏的表层，露出内部。

youdao

As a comet gets closer to the sun, some gases in it begin to unfreeze.

当彗星接近太阳时，其中的一些气体开始解冻。

youdao

Watch a comet, where is it going?

观察一颗彗星，它将往何处去？

youdao

Sometimes,observers see this as a comet's tail, which can be visible to the unaided eye stretching across the night sky.

VOA: special.2011.02.09

Suppose the planet were hit by a comet-- this happened--something like this happened sixty-five million years ago, so it could happen again.

假设这个星球被一颗彗星击中-,这样的事，大约六千五百万年前,发生过，所以它还可能再发生。

耶鲁公开课 - 金融市场课程节选

One argument against the comet theory is that a comet would have left a large hole in the Earth's surface.

VOA: special.2009.01.20

In 1999 NASA launched a mission to collect and bring back samples from a comet.

NPR: Stardust Set to Deliver Comet Samples

Let next Monday be the day when statesmen take the first stop towards a comet-free future.

ECONOMIST: Stop that comet

What they don't think about is - what are the chances of a comet hitting anything, ever?

BBC: Earth