A small subset of studies in the review did try to answer that question by experimentally manipulating how much carbon entered test plots of soil.

评审中进行的小型研究确实通过在实验中控制进入实验田土壤的碳量尝试回答那个问题。“那个数据集是尝试性的，不过，它确实蕴含着回输。”

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The problem for researchers is how to manipulate people's relationships experimentally to effectively test the differences.

研究者的难题在于如何控制人们在实验中的关系以便于有效率地测试区别。

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We decided to test the theory experimentally.

我们决定对这个理论进行实验检验。

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To test their technology, Rabiner and Hare used it to experimentally treat prostate enlargement, where the prostate grows and compresses the urethra.

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