在许多细胞中,含量最高的磷脂是磷脂酰乙醇胺或脑磷脂.The most abundant phospholipid in many cells is phosphatidyl ethanolamine or cephalin.乙醇胺在气体的纯化和分离方面也是有用的.Ethanolamines are also of value in the purification and the separation of gases.利用不经提纯的棉...
A changing world has put pressures on the company.日新月异的世界使这家公司感到了压力。The material requires higher temperatures and pressures to set hard.这种材料需要有更高的温度和压力才能凝结变硬。Reduced interest rates would help ease recessionary pressures ...