Just persevere, knowledge, finally discovered the secret.

只要持之以恒，知识丰富了，终能发现其奥秘。

What would you do if you failed？ Many people may choose to give up. However, the surest way to success is to keep your direction and stick to your goal.

如果你失败了，你会怎么办？很多人可能会选择放弃。然而，通往成功的最可靠方法是保持方向并坚持目标。

Every great achievement背后都需要有毅力，很多时候我们并没有太多的依靠，我们能做的只有坚持，只有依靠自己。

每一个伟大的成就背后都需要有毅力，很多时候我们并没有太多的依靠，我们能做的只有坚持，只有依靠自己。

Results are not important, but they can persist for many years as a commemoration of.

结果并不重要，但它们可以持续多年作为纪念。

During our lifetime we will meet with all kinds of difficulties, and most people will feel depressed and then give up, while only a few people are able to adhere to the end.

在我们的一生中，我们会遇到各种各样的困难，大多数人会感到沮丧然后放弃，而只有少数人能够坚持到底。

Never, never give up. These can be encouraging words and words of determination.

永远不要放弃。这些是可以鼓舞人心的话语和决心的话语。

Some things are not see hope to insist, but insisted the will see hope.

有些事情不是看到希望才去坚持，而是坚持了才会看到希望。

Yesterday is based on, keep today, and tomorrow will be successful.

坚持昨天是立足，坚持今天是进取，坚持明天是成功。

这些句子涵盖了坚持的重要性、面对困难的态度以及坚持带来的最终成功。你可以根据自己的演讲场合选择合适的句子来表达你的观点。