例句與造句

1. The sedimentary dust has solid particles that settle as dust on different surfaces or float through the air.
2. The two districts with the highest concentration of sedimentary dust are El Agustino ( 46.1 tons / km2 ) and Independencia ( 25.5 tons / km2 ) in February 2014.
3. It's difficult to find sedimentary dust in a sentence. 用sedimentary dust造句挺難的