Complaints must be made through the proper channels.

投诉必须通过正当途径进行。

《牛津词典》

A distinction must be made between archaeology proper and science-based archaeology.

必须对严格意义上的考古学和以科学为基础的考古学加以区分。

《柯林斯英汉双解大词典》

Cancellations must be made in writing.

撤销必须有书面通知。

《牛津词典》

Some researchers and editors say changes must be made to stop such false author claims.

VOA: special.2009.10.08

It's going to be cancelled next year. I won't get my money back.' Loans must be made even if the debt will be cancelled, for the simple reason that the problem of poverty is a terrible and persistent problem.

因为在来年贷款会被解除，他们就收不回自己的钱了,即使是债务会被免除，人们也必须给人借贷，这仅仅,是因为贫困是一个长久存在的可怕问题。

耶鲁公开课 - 旧约导论课程节选

And I use the term photon here, and that's because he also concluded that light must be made up of these energy packets, and each packet has that h, that Planck's constant's worth of energy in it, so that's why you have to multiply Planck's constant times the frequency.

我这里用光子这个词,是因为他还总结出光,必须由这些能量包组成，每个能量,包有这个h，普朗克常数代表,里面的能量，所以这就是为什么你们,要用普朗克常数乘以频率。

麻省理工公开课 - 化学原理课程节选

The improvements must be made to a home that qualifies as your principal residence.

FORBES: Heat Wave Sweeps U.S., Reminds Taxpayers of Value of Energy Credits

Heroic assumptions must be made here about the willingness of American farmers and distillers to compete.

FORBES: Magazine Article

They also say the world's food production systems must be made resilient to climate change.

CNN: Billion dollars pledged for food crisis