（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。
As critical talks over Iran’s nuclear programme entered their second round on Thursday night, and a vast US military buildup continued in the Middle East, the Trump administration warned of drastic consequences if Iranian negotiators failed to make significant concessions.
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