side lagging

基本解释

Rather than one partner lagging or dragging behind the other, happy couples walk comfortably hand in hand or side by side.
幸福的伴侣们总是舒服地手牵手或者肩并肩走着，而不是一前一后。

And that perhaps, with polls putting Mr Kohl's side lagging behind the Social Democrats by at least three points, the overall strength of support for the Social Democrats' candidate is being overestimated?
ECONOMIST: Germany’s election
The U.S. market, while lagging in volume terms, is showing another side, Lamb said.
FORBES: Interview: Gold Jewelry Sparkles In Both East and West But With Cultural Differences--WGC Official
Over the next few months, MOS broke above this trendline, negating any short side opportunity, but I kept them on my radar knowing that MOS lagging the general market was a huge signal that could not be ignored.
FORBES: POT Is Going Up In SMOKE