（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。
Simple physics means a steel and concrete venue filled with thousands of people is already a very harsh network environment, says Elliot Townsend, senior director at HPE Networking.
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However, because a medical degree can take five or six years to complete - longer than most other degree courses - the BMA argues resident doctors' pay should reflect the fact that they may have more student debt than other graduates.
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