They planned to go to Lawrence and burn it to the ground.

VOA: special.2009.05.07

So if we go to the ground state, what you see is we're at that lowest energy level, and we only have one possibility for an orbital, because when n equals 1, that's all we can do.

如果我们在基态上，你可以看到，我们在能量最低的态上，只有一种，可能的轨道，因为n等于1，只有这种可能。

麻省理工公开课 - 化学原理课程节选

The ionization energy must then be nothing more than, that is the energy to go from the ground state here to n equals infinity, so that would be the energy at state infinity minus the energy of the ground state.

这个电离能一定不会大于，从基态到n为无限大时的能量,而是等于,无限远处的能量减去基态能量。

麻省理工公开课 - 固态化学导论课程节选

It was just lying on the ground. All you had to do was go to Alaska, and then to the Klondike area of the Yukon Territory of Canada and collect your gold.

VOA: special.2009.02.04

"It's important for many reasons, really,to give the confidence to the ground teams -- all our American GIs as well as our coalition partners on the ground -- that if they do get injured, there's somebody to go get them, whether it's in a benign situation or in the middle of a firefight."

VOA: standard.2010.04.27