某种程度上，在美国丰富的在线广告市场是革新的一种阻碍，并强迫许多网络公司将提高服务提高页面浏览量作为很重要的量度。

In a way, the rich online AD market has been holding back innovation in the US, and forced most Internet companies to design their service around pageview as a main metric.

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他们成功的一个量度是，低成本航空公司的市场份额似乎已经稳定在了30%左右，至少目前如此。

One measure of their success is that the market share of low-cost carriers appears to have stabilised at around 30%, at least for the moment.

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