Gliding more efficiently, with less drag, can cut vital fractions of a second from a swimmer's time.

更有效的滑行、减少阻力，可以降低对运动员至关重要的须臾的比赛用时。

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We expect the drag from residential investment to continue in the first quarter, but with less impact on GDP than in the second half of 2006.

FORBES: Strong Growth, But Watch Inflation