口碑的正负 评价偏向（即评价高低，包括不相关、中性、正面、负面、综合等

Evaluation of positive and negative word of mouth bias (ie evaluation of the level, including unrelated, neutral, positive, negative, and other comprehensive evaluation of different evaluation reflect different levels of consumer satisfaction);

The positive and negative evaluation bias of word-of-mouth (i.e. evaluation, including irrelevant, neutral, positive, negative, comprehensive and other evaluation, different evaluation reflects the different degrees of consumer satisfaction);

Positive and negative evaluation bias of word-of-mouth (i.e. evaluation level, including irrelevant, neutral, positive, negative, comprehensive and other evaluations, and different evaluations reflect different levels of satisfaction of consumers);<br>