The growth of derivatives and modern information technology also contributed to the speed of the contagion.
衍生物增加，资讯科技发达，也加速了经济不景之风蔓延。
In goal contagion researches, goal is usually activated by the words relevant to goal or the stories containing social information.
已有研究中通常采用目标相关词汇、社会信息两种方式进行目标的激活。
The growth of derivatives and modern information technology also contributed to this speed of the contagion.
衍生物增加，资讯科技发达，也加速了经济不景之风蔓延。
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