主: host用: 40分钟跑完全程 run the course in 4 ...主用(的): active主用灯: active indicator非主用信号: non-active signal双主用系统: dual primary system主用方式: worker mode主用接收机: main receiver主用频率: primary frequency主用卫星: primary satellite主用配电系统: primary distribution system主频率主用频率: primary frequency主用参考时钟及备用时钟: primary reference and slave clocks技术娴熟的磨坊主用雪橇杀死了上百万头狮子: the skilful miller killed millions of lions with his ski主硬盘: modem) primary hard drive; primary hard drive主硬碟: primary hard drive主营业务税金及附加: sales tax; tax and additional duty of main operation; tax and associate charge; taxes and surcharges主营业务收益率: mark 2主营业务收入: achieve the total revenue of for its main business; prime operating revenue; revenue from main operation; revenue from principal operations; revenues; sales revenue