For galaxies above a critical size, more than 100 million solar masses of dust can be channelled towards the centre within just 100, 000 years, creating a dense cloud in the centre.
对于星系超过临界大小的星系，超过一亿太阳质量的尘埃可以在仅仅十万年内被引导到中心，在中心产生了高密度的尘埃云。
For galaxies above a critical size, more than 100 million solar masses of dust can be channelled towards the centre within just 100, 000 years, creating a dense cloud in the centre.
对于星系超过临界大小的星系，超过一亿太阳质量的尘埃可以在仅仅十万年内被引导到中心，在中心产生了高密度的尘埃云。
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