有了索引之后，就可以从此数组提取商品的小计金额、税额以及最终的合计金额。

Now that you know the indexes, you can extract the values for the merchandise subtotal, taxes, and final total from the array.

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私营部门的保险相当不错，他们将会承担这笔消费的一部分，而余下金额则需从国库提取。

The private sector, which is reasonably well insured, will cover part of the bill but the rest will have to be financed out of the public purse.

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withdraw (float amount)：从帐户中提取指定量的金额。

Withdraw (float amount) : Withdraws a specified amount of money from the account.

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