文章首段要簡要介紹兩段材料，第一段材料為一對母子買旅行箱看了網上的評論，結果買回來的旅行箱質量很好。第二段材料為一幫人去餐館吃飯，看了on-line rating，結果飯菜很不好吃，從而凸顯出online rating的不靠譜。
Possible version one:
As a major channel of consumption information, the rating is an efficient source of information for shopping in our own consumption. Interestingly, the same rating may have different influences on different consumers.
There is no doubt that it is unwise to depend completely on the ratings in consumption. The advantages and disadvantages of ratings are often closely related. It is necessary to hold an objective attitude towards ratings.
Possible version two:
Nowadays, most commodities or services are rated through certain channels. These ratings, easy to access, are playing an increasingly important role in customers' purchase decision. However, results are sometimes unsatisfactory.
There is no denying that such ratings might bring convenience to consumers, but they are often misleading and unreliable. As we all know, most of the ratings are based on others’ judgment on the product or service concerned. Every judgment comes from a specific need or a unique psychological state. Apparently, blindly following others' advice will affect our own judgment. Another fact should not be neglected that some of the ratings are the outcome of a careful manipulation of companies or sellers. It has become a common practice for some to pay
for good ratings on their products or services so as to increase their sales.
Therefore, we should give a second thought to these ratings whenever we go shopping.