A band of human rights activists stormed the embassy and took several people hostage.一帮人权活动分子冲进大使馆，将数人扣为人质。On the issue of industrial pollution, the environmental activists pleaded with the government not to soft-pedal.自然环境保护活动分子请求政府不要对工业污染问题采取低调态度。His home was firebombed by animal rights activists.他的住所被动物权利活动分子投掷了燃烧弹。