All the children must learn a foreign language.

所有的儿童必须学一门外语。

《牛津词典》

Children must learn socially acceptable behaviour.

儿童必须学会社会上认可的行为举止。

《牛津词典》

You must learn how to construct a logical argument.

你必须学会怎样确立合乎逻辑的论点。

《牛津词典》

I found that I must learn to walk all over again.

VOA: special.2010.07.10

You must learn to read closely.

你们必需要学着仔细地阅读。

耶鲁公开课 - 政治哲学导论课程节选

This "you have to" pattern is something that you really must learn,

you have to”句型是英语学习中必不可少的句型，

have to 课堂 - SpeakingMax英语口语达人

Individuals must learn to master their finances before they become a slave to debt.

FORBES: Do We Take Debt Seriously Enough?

They must learn Portuguese, work in often difficult conditions and, in some cases, avoid police raids.

CNN: Booming Brazil lures immigrant workers

We must learn to live together, to live next to one another and with one another.

WHITEHOUSE: Middle East Peace Talks