The pilot spent fifty hours in a simulator -- a copy of the plane on the ground -- preparing for his ten-minute flight.

VOA: special.2010.07.07

So Israelite-Judean religion on the ground shared many cultic forms and practices and rituals with Canaanite and Ancient Near Eastern culture generally.

因此以色列-犹太宗教本质上来说,和迦南以及古近东时期的文化,在宗教形式、操作和仪式上有很多共同点。

耶鲁公开课 - 旧约导论课程节选

Earlier this month, Michelle Obama and twenty-three schoolchildren helped prepare the ground for an organic vegetable garden on the South Lawn of the White House.

VOA: special.2009.03.31

"Despite more than two million troops in uniform - not counting the US military - NATO has struggled,at times desperately, to sustain a deployment of twenty-five thousand to forty-five thousand troops, not just in boots on the ground, but in crucial support assets."

VOA: special.2011.06.11

The military is already shifting to a newer, slightly less sophisticated aircraft, the F-35 Joint Strike Fighter, designed more for attacking targets on the ground.

VOA: standard.2009.07.21

U.S.Defense officials say the new plan would include interceptor missiles deployed on U.S.Navy ships in the North Sea and Mediterranean, in addition to ground-based weapons.

VOA: standard.2009.10.21