computerized switching system造句

例句与造句

1. After his master's degree, Jacobson joined Ericsson and worked in R & D on computerized switching systems AKE and PLEX . After his PhD thesis in April 1987, he started Objective Systems with Ericsson as a major customer.
2. It's difficult to find computerized switching system in a sentence. 用computerized switching system造句挺难的