The codicil must first be signed and dated by you in the presence of two witnesses.

该遗嘱附件必须首先由你当着两个连署人的面签名并写上日期。

《柯林斯英汉双解大词典》

The prison governor has refused to let him go, saying he must first be given authority from his own superiors.

监狱长已拒绝释放他，说他必须首先得到上级的许可。

《柯林斯英汉双解大词典》

Wait, I must first cut them for you.

等等，我得先给你剪下来。

youdao

Doctors can collect it with a needle. But people who donate marrow must first have tests to make sure they are a good match for the patient.

VOA: special.2009.12.16

In other words, to make people obey you, you must first make them believe you.

换句话说即要让人们服从你，必需要先让他们相信你。

耶鲁公开课 - 政治哲学导论课程节选

Best way to lose weight? Well, first of all, you must be active.

减肥最好的办法？嗯，首先，你必须积极主动。

要拥有好身材 - SpeakingMax英语口语达人

To become a great leader of others we must first take charge of ourselves.

FORBES: The Essence of Leadership

In order to calculate an earnings yield premium you must first calculate an earnings yield.

FORBES: The Stock Markets Are Forecasting Economic Stagnation, Not Recovery

Cypriot leaders must first reach agreement with their fellow members of the EU, he added.

BBC: Cyprus crisis: Pressure grows over bailout