Provisions available in local shops have to be flown into Nunavut on one of the most costly air networks in the world, or brought by supply ship during the few ice-free weeks of summer.

在商店里出售的生活必需品只能通过世界上最昂贵的空运系统运达或是在非冰封期用运输船运来。

Instead of a big order book, it hopes to focus investment on higher-return services along the supply chain, from ports to rail, road and air networks, becoming, in the jargon, an integrator rather than a mere box-carrier.

它希望将投资集中在从港口到铁路、公路和航空网络的供应链上的高回报服务，而不是大量的订单，用行话来说，成为一个集成商，而不仅仅是一个集装箱承运人。