It is a reminder of from Ashes to Ashes and DusttoDust.
这是一个提醒：尘归尘，土归土。
2
Dusttodust, soil to soil, waved goodbye two hundred and fifty.
尘归尘，土归土，挥手告别二百五。
3
The explosion lifted about 100 trillion tons of dust into the atmosphere, as can be determined by measuring the thickness of the sediment layer formed when this dust settled to the surface.