That’s why some freelancers add a PITA fee when dealing with difficult clients (they’ll build this into their project fee, rather than listing it on the invoice!).
这也是对付刁钻的客户时，一些自由职业者会多收通讯费的原因。 （他们会把通讯费分解到项目服务费中，而不是直接列在收费清单上！）
It begins by creating the root invoice element as a string and loading it into a SimpleXML object.
它先创建字符串类型的根invoice元素并将其载入到一个SimpleXML对象。
Beijing invoice is generally applicable to books is not perfect, but can control raw materials or into the sales tax.
北京开票一般适用于账册不够健全，但是能够控制原材料或进销货的纳税单位。
Beijing invoice is generally applicable to books is not perfect, but can control raw materials or into the sales tax.
北京开票一般适用于账册不够健全，但是能够控制原材料或进销货的纳税单位。
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