网站说这个组合将为了一场世界巡回演唱会复合，并提供给粉丝们一个链接可以购买全球11个城市的入场券。演唱会将于12月7日从洛杉矶开始。

The Web site said the group had come together for a world tour and provided a link for fans to buy tickets in 11 cities across the world starting on December 7 in Los Angeles.

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作者认为资源安全是资源供给与需求相互均衡的产物，它是一个内涵丰富的复合范畴。

The authors consider that the resources security is the mutual balance of resource supply and demand, thus it is a multiple concept with rich implications.

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