The universal wheels of the crutch provided by the invention can roll on the ground in use and do not need to be lifted continually to strike the ground.

本发明中的拐杖，使用时可使万向轮着地滚动，无需不断提起再敲打路面。

youdao

We need to do even better on the ground and engage with the broader Roll Back Malaria partnership.

我们需要在现场做得更好并与范围更广泛的遏制疟疾伙伴关系一起开展工作。

youdao

The work roll surface can be ground on-line by a non-driven cup type of on-line Roll Grinder(ORG) installed in a strip mill to maintain the appropriate roll shape.

它通过设置在带材轧机上的无驱动式杯形磨辊装置，对轧制中工作辊表面进行在线磨别，以保证轧辊保持良好的轨型。

youdao

Somebody in Spain put half a roll on the ground, and somebody in New Zealand put something breadlike opposite.

NPR: Dig a Hole to China? Try a Sandwich Instead

When asked last year about the rules of engagement for tear gas, he told the BBC that police in America are trained not to fire head-high and to either arc the canister into the air or roll it on the ground.

BBC: Bahraini dies after being struck by tear gas canister

Either way, it could be a long time before anyone knows what went wrong, how to fix it, and Boeing manages to roll out the repairs to the fifty Dreamliners on the ground worldwide.

FORBES: Dreamliner's Bad News May Be Getting Worse, And Not Just For Boeing