单语范例（未经PONS编辑处理）
Occasionally clearance can not keep up with development and at least one cluster munition was uncovered by road construction teams in 2010.
en.wikipedia.org In some areas, supply of electricity, especially at peak times, could not keep up with this demand, resulting in poor power quality including blackouts, power cuts, and brownouts.
en.wikipedia.org Luxury watch makers are fighting over too few parts makers in order to keep up with a booming market and counter supply bottlenecks.
www.theglobeandmail.com Apparently the sales department felt that the electric leg was a must-have item to keep up with the competitors.
en.wikipedia.org They don't want me to keep up with all the different gimmicks and trends that are taking place.
en.wikipedia.org