It is based on the properties about the path of integration and the integrand function.

根据积分路径和被积函数的特点，讨论了相应的计算复积分的方法。

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While it is not necessary for the merger to move forward, approval of the MOU helps to clear the path to labor integration should a merger to occur.

FORBES: US Airways Pilots Approve Merger Contract in Win for Union President

Italy was one of the six countries which signed the 1951 Paris Treaty setting Europe off on the path to integration.

BBC: Italy profile