We set up a system for packet transmission and transmission control, and propose a layered retransmission error control mechanism based on immediate feedback.

在立即反馈的基础上提出了一种基于分层重传的差错控制机制。

youdao

Senegal, one of Africa's most stable democracies, backed Mr Gaddafi's call for the immediate set up of a pan-African government.

BBC: NEWS | Africa | No timetable for uniting Africa