If you make a promise, you should keep it.

如果你许下一个诺言，你就应该遵守它。

《柯林斯英汉双解大词典》

You should keep a balanced diet.

你应该保持健康的饮食。

youdao

You should keep confident.

你应该保持自信。

youdao

You guys should keep Bella company.Her date bailed. What date?

VOA: standard.other

You've got to keep going a little further because you should follow the logic.

你们要做到永远多走一步,因为你们要会推理

耶鲁公开课 - 基础物理课程节选

I would say, keep that to a minimum, because what the first formula tells you should be so intuitive that you don't have to cram this.

我会说,越少越好,因为对于第一个式子的内容,你应该觉得如此自然,以至于你都不用去记

耶鲁公开课 - 基础物理课程节选

In conclusion, the inverse pyramid of regulation is a reality that you should keep in mind.

FORBES: The Best Investment Advice: Fundamental Truths About the Business of Managing Your Money (April 2, 2002 )

"So you should keep your cash component as small as possible, " Mr. Petzel says.

WSJ: The Intelligent Investor: Are Bond Rates on a Road to Nowhere?

That does not mean you should keep one finger hovering over the sell button, however.

FORBES: Market Volatility Requires A Sell Strategy