另一组人学习能够导致肥胖的基因和环境因素，例如家族历史和垃圾食品的促销。
Another group learned about the genetic and environmental factors that can contribute to obesity, such as family history and junk food marketing.
不过我们也应该看到，在市场竞争激烈的环境下，降价是厂商的促销行为，也是有利于消费者的市场行为。
With the intense competition we should also be aware that the price reduction is not only the marketing method of the manufacturers but the market behavior which benefits the customers.
在正常的市场环境下，电子阅读器在今秋将会大幅降价，尤其是在上一种旧款阅读器进行促销时。
In a rational market, we should see big price cuts this fall, especially as the last of the old models go on sale.
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