買賣就是這樣；關稅高，銷售量就少，關稅低，銷售量大；提高關稅，你能收的總關稅能提高多少呢？

來源: zhoufang 於 2025-07-12 06:23:07 [舊帖] [給我悄悄話] 本文已被閱讀：次

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