Democrats are unlikely to agree to extending the tax cuts and, despite the seeming bipartisan enthusiasm for the stimulus package, it could run into trouble on Capitol Hill. 民主党人不太可能同意延长减税政策，尽管两党在刺激经济的一揽子政策上进行了合作，但延长减税政策恨可能在国会遇到阻力。
Protein phosphorylation, which is mediated by enzymes, called protein kinases, is a major mechanism for transducing external stimuli into intracellular signals. 在这其中，把细胞外刺激转导到细胞内是通过蛋白质磷酸化来完成的，而蛋白质磷酸化又被蛋白激酶介导。
