采取汽车保养最佳实践所产生的效应，例如更换机油或检查轮胎的气压，并不能用于准确地评价质量，除非我们确实找到了度量质量好坏的手段。
The effect of car care best practices, such as changing your oil or checking a tire's air pressure, is not implicit unless we have measurements to quantify what we gained or lost.
消费者往往不能很精确、很客观地评价产品的价值和成本。
Consumers often do not judge product values and costs accurately or objectively.
而造成转化率低的一个原因是现有的评价方法不能准确地评价农业高新技术项目的价值。
One of the main reasons is that the current evaluating method is not suitable to evaluate the Agricultural High-tech Project.
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