How do archaeologists know where to find what they are looking for when there is nothing visible on the surface of the ground?

地面上什么也看不见，考古学家怎么知道到哪里去找他们要找的东西呢？

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American author Peter Miller explains, "I used to think that individual ants knew where they were going, and what they were supposed to do when they got there."

美国作家彼得·米勒解释说：“我曾经认为每一只蚂蚁都知道它们要去哪里，以及它们到达那里后应该做什么。”

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One of them put it like this: "You know, Bob, you can just buy so much stuff, and when you get to the point where you can just buy so much stuff, now what are you going to do?"

其中一个是这样说的：“你知道吗，鲍勃，你可以买这么多东西，当你可以买这么多东西的时候，你会怎么做？”

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When we talk about what to eat, how do we get advice on this and where do we look?

当我们讨论到我们该吃些什么的时候,我们应该从哪儿以及如何获得参考建议呢

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Another situation where you would use the "you have to" pattern is when you express what you don't have to do.

另一种使用“you have to”句型的情况是要表达那些不需要做的事情。

have to 课堂 - SpeakingMax英语口语达人

Not too long ago, leaders basically had to figure out what to do and then tell people what, when, where, and how to do it.

FORBES: Leadership: Then and Now

But that is a fluid process and to predict what might get votes and from where is hard to do when we don't even know exactly what the measure will be.

WHITEHOUSE: Press Briefing

For decades, the relationship of spa and client was really more like parents and children: From the time they crossed the threshold, the clients were told what, where, when to do and why they were doing it--the hope being that, as with children, the lessons learned would go out into the world with them.

FORBES: Magazine Article