The experiment consisted of 20 subjects and 24 passages in a within-subject design.
这个试验包括20个项目，每一个组内项目设计有24段文字。
Centola's paper on the subject, "the Spread of Behavior in an Online Social Network Experiment," is published in the Sept. 3 issue of the journal Science.
沈多纳的论文“行为传递的线上社交网络实验”于九月三日在科学期刊上发表。
In the first part of the experiment, students will subject an ordinary steel reinforcing rod to a tension test using a testing machine designed specifically for that purpose.
在第一部分，学生要用为此特制的实验仪器对一根普通预应力钢杆做拉力实验。
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