参见：不下于
完不成indicates that an action cannot be successfully completed
放心不下
unable to set one's mind at ease
敌人要塞屡攻不下
numerous assaults could not topple the enemy stronghold
汉译英翻译词典收录86165条汉英翻译词条，基本涵盖了全部常用中文字词的英语拼写、翻译、音标、读音、用法、例句等，是英语学习的有利工具。