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They based their findings on an analysis of historical trends and past research, as well as four experiments they designed.

他们的发现依据对历史趋势和过去研究结果，以及他们设计的四个实验的分析。

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The researchers designed four experiments to further test their hypothesis.

调查者设计了四个实验进一步证明他们的假设。

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They were designed to fly at speeds up to six thousand four hundred kilometers an hour.

VOA: special.2010.07.07

The exhibition will show sixty-four projects that he designed,including homes, public buildings and religious spaces.

VOA: special.2009.04.06

The robotic systems are designed to operate twenty-four hours a day.

VOA: special.2009.05.12

Four are designed to help you execute flip-flops, and four will help you appreciate the value of a flip-flop by others.

FORBES: In Praise of The Flip-Flop: Eight Reasons A Change Of Heart Is Invaluable

Power and Associates' "Highest in Customer Satisfaction with HDTVs" ranking1, announced today its new TV and audio line-up featuring an all LED-lit2 E-Series line and four newly designed sound bars.

ENGADGET: Four new soundbars from Vizio, just in time for the holidays

The World Financial Center, a complex of four towers designed by Cesar Pelli, is situated across the street from the site of the Sept. 11, 2001, terrorist attacks that destroyed the World Trade Center.

WSJ: Gag Grenade Sparks Scare