Review评分涉及变量如下： (1)时长--Age of a review (the time difference between the submission and now) (2)是否存在交易-- Whether a review is verified purchase or unverified (3)评论人的留评数是否为1 --The total number of reviews written by a reviewer (4)评价长度-- Length of a review (5)投票支持数量--The number of helpful votes (6)总投票数--The number of total votes Review分值计算公式如下， ((H+C1+log(min(Length,1750)) / log (350)+ X/2 × Trust + X/2 × Recency)) / ((T+C2)) H: 认为有帮助投票数--the number of helpful votes a review received T: 评论收到的总投票数--the number of total votes a review received X: log(1750) / log (C2) Length: 评论长度--length of a review Trust: If the review is verified purchase: 2 * (sigmoid(# of reviews written by a reviewer * 0.1) - 0.5) Trust:信任度：2 *(sigmoid(同一评论者撰写评论数 * 0.1) - 0.5) Otherwise: sigmoid(# of reviews written by a reviewer * 0.1) - 0.5 R: recency - 2 * 1/(1+exp((time - submission_date) / (30 months))) Recency：评论时间：-2 * 1/(1+exp((即时日期 – 评论提交日期) / (30 months))) 常数C1, C2, and C3: Constants set differently by marketplace. In the US, C1, C2, and C3 are 13.1056, 350, and 20.04, respectively. 总结：由此可见，详情页面review的分值涉及评论质量、时长、真实性等多种综合性因素，保证为买家提供客观、准确的参考。