Before the medical exam, you must fast.

在体检之前，你必须禁食。

youdao

You must have seen this kind of fast food chain restaurant.

你一定见过这种快餐连锁餐厅。

youdao

And the fourth requirement, though very detailed, does not tell you what the system must do; instead, it specifies how fast the system must be.

第四条需求虽然非常详细，但并没有告诉你系统必须做什么；它只是规定了系统必须有多快。

youdao

You must know which seeds of opportunity are not growing as fast as you thought.

FORBES: How Google Refined the Entrepreneurial Spirit by Applying Strategic Focus to Invent a New Industry

You must maximize the profits of an outdated product line as fast as possible.

FORBES: Netflix - The Turnaround Story of 2012!