A new study says women's rights have gained some ground in Arab Gulf states since a similar study completed five years ago.

VOA: special.2009.03.07

So, if we're talking about five different orbitals and we're talking about a ground state atom, we know that we just need to start at the bottom and work our way out up.

因此，如果我们要讨论的是,五个不同的轨道且是属于一个基态原子的话，我们知道，我们只需要从最低的轨道,开始一个一个往上找。

麻省理工公开课 - 化学原理课程节选

Between thirty and thirty-five women used each system to pump water from the ground or a stream.

VOA: special.2010.01.11

He mentioned military or intelligence forces on the ground just five times.

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U.S. stocks have been slumping, losing ground for five consecutive weeks.

FORBES: Is The Market's Slump A Concern?

The council deal means Argyle would have an option to buy back the ground every five years for a sum equal to 12 times the then annual rent.

BBC: Plymouth Argyle Home Park stadium deal agreed