1938年,哈佛大学的梅森组织成立了包括贝恩、凯森 (Kaysen)、米克尔(Mickle)、马卡姆(Markham)和艾德曼(Addman)在内的 产业组织研究小组,以案例研究的方式,对美国不同产业的市场结...
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但如你所见,凯文·理查森就喜欢这么做,而且对自己的安全信心满满。
But as you can see, Kevin Richardson enjoys doing just that - and insists his actions are perfectly safe.
凯若维森灯的小巧外形与发光的二极管相似,但前者比那种半导体装置发出的光更加明亮。
The lamps' small size makes them comparable to light -emitting diodes but the new lamp generates much brighter light than those semiconductor devices do.
确实,传统的电灯泡只将5%的能量换化为光能,荧光管则用15%的能量换化为光能,而凯若维森灯的能源利用率至少是50%。
Indeed, whereas traditional light bulbs emit just 5% of their energy as light, and fluorescent tubes about 15%, the Ceravision lamp has an efficiency greater than 50%.
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