Not very long ago, it was also unthinkable that a virus would shut down nations and that safety nets would be proven so disastrously lacking in flexibility.

不久以前，人们还无法想象一种病毒能使众多国家封闭，而安全网被证明是如此灾难性地缺乏灵活性。

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He says the safety of cloud computing has yet to be proven and likely requires work to reach acceptable levels.

他还指出云计算的安全性已经被广泛认可，而且要求颇高。

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Rockwell Automation is committed to improving worker safety and productivity for its customers with a comprehensive and proven safety portfolio.

罗克韦尔自动化致力于利用其综合性和经过验证的安全产品组合，改善客户的工人安全和生产力。

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The exceptional safety record and proven dispatch reliability make the King Air 250 a viable corporate aircraft.

FORBES: The Most Successful Aircraft Design Gets Even Better

While nuclear power here has a proven safety record, the public must be assured that its officials have considered all the contingencies.

FORBES: Nuclear Energy Radiating on Capitol Hill

Dr Fox said the instruments should be banned across the UK until their safety had been conclusively proven.

BBC: Surgical instrument inquiry call