Used bookstores and libraries are known for their musty air and familiar smell — but people with dust allergies can have serious problems in spaces like these when thick layers of dust are stirred up. (health.com)
In one of the first storage areas, we found a mothballed Ferrari F40 wearing a criminally thick layer of dust. (automobilemag.com)
«Distance measurements in astronomy are difficult, especially to sources like Circinus X-1, which are hidden in the plane of the galaxy behind a thick layer of dust — which makes it basically impossible to observe them with optical telescopes. (sciencedaily.com)