Mrs.Opiyo was among the women who visited the free medical camp in Kenya to have operations to correct their condition.
VOA: special.2010.08.09
No, OK and that's correct, because each photon of light actually has more energy than is needed to eject an electron.
没有,好,对了,因为每一个光子实际上,都有更多的能量去逐出一个电子。
You know, speak even if you're not sure exactly what you're saying is totally correct,
即使你不能确定你讲的内容是否完全正确,你也要开口讲出来,
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