预则立，不预则废，是一句非常经典的谚语。这句话告诉我们，在做任何事情之前，必须先做好充分的准备工作，制定详细的计划和目标。否则，即使开始了，也很难达到预期的效果。

这句话可以应用于各种场合，比如工作、学习、生活等。在工作上，我们必须制定合理的工作计划，分配任务，明确每个人的责任和目标，才能有效地完成工作任务。在学习上，我们必须有系统地学习，制定学习计划，按照计划进行学习，才能更好地掌握知识。

如果不做好充分的准备工作，那么很可能会出现各种问题，比如工作进度缓慢，学习效率低下，生活习惯不良等等。因此，预则立非常重要，它可以帮助我们更好地规划未来，更好地应对挑战。

总之，预则立不预则废，是一句非常有智慧的谚语。我们要时刻牢记这句话，注重做好充分的准备工作，才能更好地实现自己的目标和梦想。

Translation:

'Preparation is key, without it all is lost' is a classic proverb. It tells us that before we start doing anything, we must prepare well by making detailed plans and goals. Otherwise, even if we start, it is difficult to achieve the expected results.

This proverb can be applied to various situations, such as work, study, and life. In work, we must make reasonable work plans, allocate tasks, clarify responsibilities and goals for each person, in order to effectively complete work tasks. In studying, we must learn systematically, make study plans, and follow the plans to better grasp knowledge.

If we don't prepare well, various problems may arise, such as slow work progress, low learning efficiency, and bad habits in life. Therefore, preparation is very important. It can help us better plan for the future and better cope with challenges.

In conclusion, preparation is key. We must always remember this proverb and pay attention to doing a good job of preparation in order to better achieve our goals and dreams.