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"There are concerns in most O.E.C.D.countries that the number of nurses is too small to respond to the demand.
VOA: special.2010.06.07
So we can figure out the energy of each photon emitted by our UV lamp by saying e is equal to h c over wavelength.
所以我们可以计算出,每个从紫外光源射出的光子,也就是e等于h乘以c除以波长。
Am I thinking back there, "Well, it starts in C and that's got an E up there and it's got a G"?
我当时是不是在想,这曲子是C调开头的,是在这里升到E调然后到G调吗
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