an arrangement that helps to prevent disaster if something goes wrong （防备不测的）安全网；保障措施 a financial safety net 金融 “安全网” people who have fallen through the safety net and ended up homeless on the streets 未能享受保障措施终致流落街头的人
a net placed below acrobats, etc. to catch them if they fall （保护杂技演员等的）安全网