They can then calculate how big a premium people are willing to pay in one attribute (price) to get what they want in another (a larger screen).

然后研究人员可以一种属性(价格)衡量，计算人们愿意付多大的额外费用得到他们想要的另一种属性(更大的屏幕)。

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However, since we are not even using an img tag, we can't set an Alt attribute, which is vital for mobile visitors, search engines, screen readers and the like.

虽此，因为我们甚至没使用一个img标签，我们不能设置alt属性，而这对移动用户、搜索引擎、屏幕阅读器之类的来说至关重要。

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From the module destination's attribute screen, locate the field Maximum failed deliveries, and set it to any integer from 2 to as high as you want.

从模块目的地的属性屏幕中找到字段Maximum failed deliveries，并将其设置为大于2的所需整数。

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