Mr. MCWHORTER: I'd like to see a little more concentration on our own community, and then we'll get to Africa.

NPR: Roundtable: Chrysler's Deep Cuts, 'Rebranding' Africa

This noise consisted mainly of the high-pitched whirr of the CPU fan, but it was barely noticeable -- to the point where if you got distracted, you'd have to re-focus your concentration just to make out the sound.

ENGADGET: How-to: Build a multi-talented HTPC for (roughly) $1,000

The third major change is the concentration of activity in Washington, D.

NPR: Intelligence Failures In 'Top Secret America'

Like Mr. Madrigale, I'd been impressed by their depth of flavor, concentration and finesse.

WSJ: Growing Your Own Grapes Isn't the Only Way | On Wine by Lettie Teague