xùn / kuàng / zhōng / jì / céng / jīng / guǎng / fàn / yòng / yú / lián / jiē / bù / tóng / dì / qū / de / qǐ / yè / wǎng / luò

讯框中继曾经广泛用于连接不同地区的企业网络。

Frame relay was once widely used to connect enterprise networks in different regions.