This statement assigns TaxRate (ref) to the Connecticut tax rate (calculate) only if the user lives in Connecticut (relevant condition).

这条语句仅当用户居住在康涅狄格州(relevant条件)时，才将TaxRate (ref)赋值为康涅狄格州税率(calculate)。

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The calculate attribute defines the value that you want to bind to the node; in this case, you bind TaxTotal to the product of TaxRate and SubTotal.

calculate属性定义您希望绑定到节点的值；在本例中，您将TaxTotal绑定为TaxRate和SubTotal的乘积。

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You need to define similar statements for New York and New Jersey, ensuring that TaxRate is bound to the value for the appropriate state in any given case.

您需要为纽约州和新泽西州定义相似的语句，以确保在任何给定的情况下将TaxRate绑定至适当的州的值。

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