What's the maximum amount of wine you're allowed to take through customs duty - free ?海关准许携带酒类的最大 免税 限量是 多少 ?Did you have to pay customs duty on that?你们必须为此给顾客付款 吗 ?Customs duty is a toll payable on merchandise...
Their faces were blackened with soot.他们满脸煤灰。Soot is the product of the imperfect combustion of fuel.煤烟是燃料不完全燃烧的产物.Soot is usually the product of the imperfect combustion of fuel.煤烟通常是燃料不完全燃烧的产物....