例句與造句

1. Requiring an operator in order to function ( " a manual exchange " ; " a manual executive " )
   說明為了正常操作需要有操作人員的工作（如人工交換、人工執(zhí)行） 。
2. It has the function of conference calling , manual exchange and pcm exchange etc . based on the brief analysis of working state of the pbx , we set up a frame model of the software , and the main arithmetic which make up of this model are given
   本文首先介紹了各部分的硬件實現(xiàn)，在控制軟件的設(shè)計中通過建立合理的軟件模型來解決系統(tǒng)的實時性和并發(fā)性的問題，最后給出了此類軟件的cad系統(tǒng)設(shè)計的方法。
3. It's difficult to find manual exchange in a sentence. 用manual exchange造句挺難的