The most wildly used strategy for pricing involves dividing the product by price range, that is , by whether the price should be high, low, or medium.
參考答案:by whether不是一个词组，不能说有什么意思。
其实这句话的意思是说：把产品价格进行分级是使用的最广泛的价格策略，也就是说，把产品的价格分为高，低，或者适中。
by whether the price should be high, low, or medium.是对
by price range的解释
by是一个介词
