例句與造句

1. The paper introduces various identification methods for tracing the malicious call and calling identification services in spc telephone exchanges , especially describes the malicious call trace methods by using switch boards and " r " key tandem function and telephone set which can display calling subscriber ' s numbers
   介紹了程控電話交換機追查惡意呼叫和主叫用戶信息識別業(yè)務(wù)的各種識別方法，特別是詳細介紹了利用話務(wù)臺和話機上的" r "鍵轉(zhuǎn)接的功能，以及利用能顯示主叫信息的話機來顯示主叫電話號碼和追查惡意呼叫電話的方法。
2. It's difficult to find switch board in a sentence. 用switch board造句挺難的
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