随着边境变得更加脆弱，从非法毒品到传染病和恐怖主义的一切的跨境传播变得更加容易，全球最大经济体之间必须合作解决这些威胁。
As borders become more porous to everything from illicit drugs to infectious diseases to terrorism, the largest economies will have to cooperate to cope with these threats.