准备好而暂时不用，以应急需to keep something in reserve
坚持“宁可备而不用，不可用而不备”的原则，克服一切困难。
Stick to the principle of “it is better to keep things in reserve than to use up all one’s resources” in order to overcome all difficulties.
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。