"What is necessary in this case is a collective effort, not only by the researchers and the people on the ground, but also the donor community, because controlling those two diseases can go a long way in improving people's food security and livelihoods in Sub-Saharan Africa."

VOA: special.2009.09.21

It says you are on the ground on two occasions.

在两个点你是在地面上的

耶鲁公开课 - 基础物理课程节选

"Right now we have a little over two-thousand troops on the ground, another nine-thousand in the area on the ships supporting us,"

VOA: standard.2010.01.20

The international forces will handle the two outer tiers on the ground and in the air for the thousands of polling stations nationwide.

VOA: standard.2009.08.16