However, too often, inner cities are viewed as places of blight, poverty, and social ills.

然而 市中心经常被看作是衰败 贫穷和社会弊病的地方

These countries can no longer be viewed as a single entity.

这些国家不能再被看成是一个单独的实体。

WS-Polling can be viewed as a reverse protocol.

WS - Polling可以看作是反向协议。

Such input can be viewed as a vector:

这样的输入可以看成一个向量：<X 1, X 2, ...

In other words, it can be viewed as a data service.

换句话说，它可以被视为一种数据服务。

This approach can be viewed as the "foot in the door" approach.

这种方法可以被看作 “脚踏实地” 的方法。