1.   Dust particles floated in the sunlight.

2.   I could see the tiny dust particles in front of my eyes.

3.   It occurs when dust particles high in the atmosphere filter out most of the longer wavelengths of red light.

4.   She also seemed very sensitive to the sunlight and the dust particles streaming into my office.

5.   Swirling dust particles caused him to sneeze and he looked down at the old books and papers with watery eyes.

6.   The bomb blast fractured the ventilating system and spewed dust particles along the system throughout the hospital.

7.   The dust particles might be better at catching the wind, like fluff on a willow seed.

8.   ...a dust particle weighing only a thousandth of a gram.

9.   You can see the dust particles floating through the air.