Use parentheses to enclose qualifying detail that is of secondaryimportance to the main discussion. Use parentheses sparinglywithin sentences; commas often do the jobbetter. Parentheses can also be used to enclose one or moreentire sentences that add relevant but not essential detail tothe main discussion.
The laser-alignment system uses small-diameter(approximately 0.25 in.), optical-quality mirrors embedded inthe reflectors.
To make the piano's tone expressive, Brown files the crownsand shoulders (tops and sides) of each hammer to their propershape if they are worn, fluffs up the hammer felt and, ifnecessary, brightens the tone by applying a lacquer solutionunder the crowns of the hammers.
--James Boyk, "The Endangered Piano Technician," ScientificAmerican
The comparison between our data and models shows that formost of the Cascadia coast the locked zone is restricted to aswath 50 to 100 kilometers across that runs underneath thecontinental shelf. (It widens considerably only near the coast ofnorthern Washington.)
--Roy D. Hyndman, "Giant Earthquakes of the PacificNorthwest," Scientific American
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