因此，传入的 ROI 参数并不一定就是最终参与计算的 ROI，但在不越界的情况下，两者通常一致。
The rate hovers around 12.5%. The reasoning checks out for a fixed semicircle. But go back to the first demo and drop 4 points a bunch of times. The rate there is closer to 50%, not 12.5%. Something is off.
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SlidesBackground materials on mediationImai, Kosuke, Dustin Tingley, and Teppei Yamamoto. (2013). “Experimental Designs...，详情可参考旺商聊官方下载
"At the River Itchen we have more than £70m worth of improvements to improve water quality as part of a wider plan for the River Test and Itchen, we will be announcing these in more detail later this year."