模-数数-模转换器
analog to digitaldigital to analog converter
ρπγ耦合常数的符号
sign of ρπγ coupling constant
符合~的作法会计规则
compliance with accounting regulations
符合的SGML应用
conforming SGML application
符合的变体SGML文件
variant conforming SGML document
符合合约要求
met contract specifications