Of course, that string is a cosmic trail of gas, dust, and stars about 22, 000 light-years long.

当然，那条线是由气体、尘埃、恒星组成的约22000光年长的宇宙余迹。

youdao

Of course, that string is a cosmic trail of gas, dust, and stars about 22, 000 light-years long.

当然，那条线是由气体、尘埃、恒星组成的约22000光年长的宇宙余迹。

youdao