号 0-S21r=-S8 aT T2 19 19 P nB nC B T , , ( )   = T P nC P nB nC nB G T , , , , [ ( ) ]     = P nB nC T P nC B T G n , , , , [ ( ) ]     = T P nC nB S , , ] ( ) [   − = - S B b） , , 2 ] ( ) [ T H T T B P n n B B C = −   