get around 传播;散播
Layton and Beamer, whose latest study has been accepted for fall publication in the journal Environmental Science Technology, knew a lot about their subject even before they set to work. Historically, everyone from chemists to homemakers has tried to figure out just what dust is made of, and the Arizona researchers drew their preliminary data mostly from two studies of household dust conducted in the Netherlands and the U.S. The American survey in particular was a big one, covering six Midwestern states. Layton and Beamer also included a localized study in Sacramento, Calif., that focused particularly on lead contamination. What all those surveys showed was decidedly unappetizing.
figure out 理解;解决;计算
The specific dust mix in any household differs according to climate, age of the house and the number of people who live in it not to mention the occupants cooking, cleaning and smoking habits. But nearly everywhere, dust consists of some combination of shed bits of human skin, animal fur, decomposing insects, food debris, lint and organic fibers from clothes, bedding and other fabrics, tracked-in soil, soot, particulate matter from smoking and cooking, and, disturbingly, lead, arsenic and even DDT.
There are more , Beamer says. Dust is a hodgepodge of all sorts of things. It would probably be impossible to make a list of all the possible items.
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