（二）业务之间具有明显的主附关系。主要业务居于主体地位，体现交易的实质和目的；附属业务是主要业务的必要补充，并以主要业务的发生为前提。
Александра Качан (Редактор)，更多细节参见heLLoword翻译官方下载
Arm and de Wit switched themselves and their staff to a four-day week seven years ago.，更多细节参见WPS官方版本下载
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In June 1962, after gruelling medical tests, Nasa announced its "New Nine". These would be the men to deliver on President Kennedy's pledge to put American boots on the Moon.