时不我待时间不等待人指要抓紧时间，不要虚度光阴。英seize time;[查看详情]

防患未然在事故或灾害发生之前就加以防备。例毫无改革之意只在防患未然。——《鲁迅书信案》英prevent;[查看详情]

积谷防饥谓储存谷物以防饥荒。[查看详情]

后悔莫及后悔：事后的懊悔。指事后的懊悔也来不及了。[查看详情]

未雨绸缪天还没下雨先把房屋门窗修好。比喻提前做好准备或预防。英repair the house before it rains; don't have thy cloak to make when it begins to rain;[查看详情]

覆水难收倒在地上的水难收回来。比喻事成定局无法挽回(多用于夫妻离异)例成媒不说覆水难收。——《敦煌变文集》英spilt water can’t be gathered up; what is done cannot be undone; it is hard to get it back again; water poured on the ground cannot be recovered;[查看详情]

居安思危处在平安的环境而想到会出现的困难危险。英be vigilant in peace time;[查看详情]

以防万一预防可能的或预期的突然变故。例加强安全检查，以防万一。英just in case; be ready for any eventualities be prepared for all contingencies;[查看详情]