Substep 3-2 is to run a while loop for each item in the list.

子步骤3 - 2是为清单中的每一产品运行while循环。

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Repeat that substep to fill all content areas, then click finish.

重复子步骤来填充所有的内容区域，然后Finish。

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In substep 3-1 of Listing 7, a child of the tag copies a value into a variable.

在清单7中的子步骤3 - 1中，标记的子标记将一个值拷贝到一个变量中。

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Stunningly, the typical answer-based tutoring systems average an effect size of around 0.35 standard deviations, and all three of the step-based, substep-based, and human tutoring cluster around an effect size of 0.75 standard deviations.

FORBES: How Machine-Based Tutoring Could Disrupt Human Tutors