That code block does nothing but increment the value of the local variable and return it.

代码段做的事就是增加本地变量的值并返回。

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The respond_to method accepts a single code block and passes one instance variable (labeled wants) into the code block.

respond _ to方法接受单个代码块，并传递一个实例变量(标为wants)到代码块。

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Call with continuation gives you a code block, and the continuation (or a saved call stack, with instance variables), which you assign to a variable.

用continuation进行调用使您获得一个代码块和指派给变量的continuation(或已保存的调用堆栈，其中有实例变量)。

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