traffic aid

基本解释

Scouts stepped in to fill public-service jobs, helping at the hospitals, sorting out aid supplies, even directing traffic.
童子军们就担任起了公共服务的工作。帮助医院，清点援助物资，甚至指挥交通。
Traffic security status is austere in our country, so the research on automobile traffic accident and aid of traffic accident is urgent and necessary.
随着我国经济的快速发展，汽车保有量不断增加，使得汽车交通事故也呈逐年上升的趋势。
SRA International Inc. has won a ＄20 million contract to provide the Federal Aviation Administration with technology designed to aid air traffic control at some of the nation’s smaller airports.
SRA国际公司与美国联邦航空局达成价值2000万美元的合同，为国内的小型机场提供空中交通管制技术。
www.etiri.com.cn

The U.S.military has assumed control of air traffic control in and out of the capital, prompting complaints from some aid organizations and foreign officials.