即使当技术具备有改变的潜力时，在第三世界的管控常常由于组织性的缺失而成为绊脚石。
Even when technologies have the potential to make a difference, deployment in the developing world often stumbles for lack of infrastructure.
世卫组织认定某些管控药物为基本药物，用于满足人群的重点卫生保健需求。
Some controlled medicines are identified by WHO as essential medicines, which address priority health care needs of the population.
19世纪初美国邮政使用了气动管精密系统，但伦敦使用了完全不同的方式，建立了这个小规模的铁路系统，只能用于包裹运输使用。
The USPS used an elaborate system ofpneumatic tubes during the early 19th century, but London took anentirely different approach and built this scaled-down railroad systemto be used only for parcels.
应用推荐