请问:primary secondary

primary master primary slave secondary master secondary slav 翻译Light source :Primary U3500,Secondary 翻译it is important to separate primary and secondary .这句 汽车电路图中标有primary CAN BUS 和secondary CAN BUS 是两根什么线啊? primary 请问Maryknoll Secondary School的SAT考场怎么样? 英语翻译1.变压器电路图里有 primary 和 secondary 两段,我知道应该是主,次的意思,但完整的应该怎么说 AYJackson Secondary secondary effect secondary effect是什么意思 请问 We should attach primary importance to job training. 请问BIOS中primary IDE 还有slave(奴隶) secondary cr/hr coils