People usually complain about having to deal with too much bureaucracy.人们经常抱怨不得不应付太多的繁文缛节。The deal with Chelsea may not, however, be dead.不过，与切尔西的交易或许还有戏。He promised to appoint an AIDS czar to deal with the disease.他许诺任命...
Methods: The technique of serum free cultivation and the methods of immunofluorescence cytochemistry were used.方法利用无血清培养技术和细胞免疫化学方法.Methods Single and double staining immunofluorescence techniques were used.方法采用免疫荧光单标记法和...