That there are good people in the world who will help you to reach your goal. That if you try again and again, you will succeed.

世界上总有好人愿意帮助你实现你的目标，如果你不懈的努力，你就一定能够成功。

youdao

If you try a sales technique and flub it, not making a sale, will you try it again?

如果你尝试了一种销售技巧，但是没有成功，一份单子都没做成，你会再试一次吗？

《柯林斯英汉双解大词典》

If at first you don't succeed, try, try again.

一次不成功就反复尝试。

《牛津词典》

A weird thing which is discussed in the textbook is if you wait a while and then you try it again with the bell after a couple of hours, the saliva comes back.

教材中讨论了一件奇怪的事情,如果你稍等一会,在几个小时之后用铃声重新去尝试，狗会重新开始分泌唾液。

耶鲁公开课 - 心理学导论课程节选

And also, if I can try you again on the GM IPO.

WHITEHOUSE: Press Briefing

It gets interesting again if you try different numbers or characters, or add spaces after typing one thing.

FORBES: The Business Of Search

You might then try to keep your lead or if you fall behind again, all the more reason to throw in another sprint.

FORBES: How To Lose Weight, Tone, & Flatten Your Belly: Intervals and Sprinting Help To Reduce Harmful Stomach Fat