To measure resolution, consider a line pair -> i.e. the wall is a line but to differentiate it, there must be a contrasting equal width along side.

我们可以把长城看作是一对线耦来测得分辨率，比如说把长城当作一条线来分辨，那么这条线两边都要以长城同等的宽度来分辨。

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Listing 4 shows this code, in the form of an application that takes a pair of command-line arguments giving the class name and method name to be timed.

清单4展示了该代码，它是一个带有两个命令行参数的应用程序，这两个参数分别给出类名和要计时的方法名。

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Line 17 explains what name and value pair to send to the action.

第17行说明了向操作发送哪些的名称和值。

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