Dumping them in, she stirs them for a bit, turns the heat down, goes back to the sink to turn off the water, and lets the lettuce sit in the sink to drain.

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If traffic congestion can be compared to water flowing through a sink drain, then a congestion toll is like the handle on the spigot -- it increases during times of peak road use, decreases during off-peak times, and is adjusted in real time to keep traffic flowing smoothly.

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After all, even the 1.3% annual performance drain identified by GAO can over time sink a plan.

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