Historically, operators have had limited control over which network customers would roam on to when abroad.

以往，运营商们对用户身处国外时所使用的漫游网络的控制力有限。

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Hospitals need to ensure they continue to provide good infection control to prevent any spread, consider whether patients have recently been treated abroad and send samples to HPA for testing.

医院必须保证继续提供好的的防控措施以防止继续传染，对那些最近在国外治疗过的病人考虑将其样本送到健康保护局检测。

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As a rapid and accurate monitoring tool, remote sensing had been used more and more in survey and control of mosquito breeding habitats abroad.

遥感技术作为一种快速、有效的监测工具，目前在国外已越来越多地应用于蚊虫调查和防治研究中。

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International legal barriers may pose another challenge to Facebook's attempts to control its intellectual property abroad.

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He noted that events abroad that the United States can't control, such as Middle East disturbances or European economic woes, contribute to economic "headwinds" at home.

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The group also wants stricter control from the government for vehicles entering the country from abroad and better access for the unemployed to all local job vacancies.

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