“赶上下大雪，我们的工作会相对轻松些，但天然雪并不能完全代替人工造雪。”他解释其中缘由，“造出来的雪湿度大，颗粒也就很大，这样才能用压雪机压实，雪友们滑起来更舒适。天然雪湿度小，颗粒也小，像面粉一样散，坡度稍微平些的地方根本滑不动。”
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The year before, Nyren’s lab had also spun off a company, Pyrosequencing AB, to refine and commercialize the technology. Pyrosequencing was not the firm that would bring the technology to market, however; that distinction went to Connecticut-based 454 Life Sciences, who licensed whole-genome pyrosequencing applications in 2003. 454 made chips which enabled highly efficient, parallelized sequencing reactions and released the GS20 sequencer in 2005 for the price of $500,000. The GS20 worked by attaching each individual DNA template molecule to a bead and copying it many times using polymerase chain reaction (PCR). Each bead was then loaded into a well in a microplate, where sequencing reactions would be carried out. The light from luciferase activation could be detected through the bottom of the wells, enabling sequences to be read.。业内人士推荐体育直播作为进阶阅读
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