Yesterday, police used tear gas against demonstrators who had set up barricades.昨天，警方对已筑起街垒的示威者动用了催泪瓦斯。Rioters set up barricades and stoned police cars.暴徒们设置了街垒，并向警车投掷石块。Rebels manned barbed-wire barricades.造反派据守铁丝网街垒。The soldiers had erected barricades to protect themselves.士兵们筑起了街垒用以自卫。