英语语法分析

They then explode, as supernovae.

然后，它们像超新星一样爆炸。

Smaller light echoes have been seen around supernovae.

规模较小的光回音可在超新星附近看见。

Now this path to supernovae will have to be investigated in more detail.

现在，这条产生超新星的途径必须要得到更加仔细的研究。