The three structures of practice, cognition and communication influence and infiltrate each other and react to and turn to each other so that an unbroken cycle is formed.

实践、认知、传播三个结构互为影响作用、互为渗透转化，呈现为不断的循环。

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Mister Hellsten says to look at parts of the genome of Xenopus tropicalis is to look at structures three hundred sixty million years old.

VOA: special.2010.06.29

So those are the three types of structures that are day structures that lead to the trades.

FORBES: Are You Afraid to Trade?

Today, workers are putting the finishing touches on some very different structures three miles south of the Pentagon along Interstate 395.

FORBES: Pentagon Should Cut Bloated Head Count, Not Weapons Programs

There are three satellite structures on the property, including two guesthouses and a gym.

WSJ: Private Properties