They must follow some common standards.

他们必须遵循一些共同的标准。

youdao

The scientists concluded that the solar wind activity must follow the same cycle.

科学家们得出结论，太阳风的活动必须遵循相同的周期。

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You must follow your own inclinations when choosing a career.

你必须按照自己的意愿选择职业。

《牛津词典》

And,the storytellers must follow several rules.

VOA: special.2009.03.27

Now, roughly speaking, Socrates' seems to think it's going to follow straightforwardly from that that the soul must itself be something non-physical.

因此,粗略地讲,苏格拉底似乎认为,这就很明确地说明了,灵魂也必须是非现实的东西

耶鲁公开课 - 死亡课程节选

You must always follow that with "if" or "to".

你必须在后面加上一个“if”或者“to”。

Is it okay 课堂 - SpeakingMax英语口语达人

It must follow the implications of its train of past decisions to their logically absurd consequences.

FORBES: The Paradox of Rights 'Granted' Us by Government

In the case of incisionless surgery, patients must follow a modified diet for three months.

WSJ: New Surgical Option for Heartburn

They must be unloaded and declared to the airline, and passengers must follow local gun laws.

CNN: Airport screeners discover more than 1,500 guns in 2012