Researchers put platelet-derived growth factor into nanoparticles and then attached them to a lattice-like, biodegradable scaffold.
研究人员把PDGF(血管源性生长因子)放入乳酸中,再把它们放在点阵样、生物可降解的支架中。
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In the past, according to Mr Green, the surface material has been too lattice-like (and thus dangerous) for proper skiing, but a British engineer has solved this.