In any case, all countries will need to carry out good post-marketing surveillance to make sure that they pick up any early sign of a safety problem with a particular vaccine.

无论如何，各国需要在疫苗上市后密切监测，确保发现特定疫苗安全问题的任何早期迹象。

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Perceived advances in safety—wider, straighter roadways and more electronic traffic sign—may make drivers too comfortable.

驾驶者在更宽、更直、更多交通信号的道路上行驶时，往往感到更大的安全性，便驾驶得似乎过于舒适了。

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For the bulls, it is a sign that investors will eventually decide to reject the safety of cash in favour of the higher returns available from riskier assets.

如果处在牛市，低利率表明投资者最终决定拒绝“现金为王”，转为更加偏好购买风险资产，以寻求更高回报。

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All three single turboprops have superb safety records, a sure sign that single-engine jet aircraft can be successful.

FORBES: Magazine Article

Pauls Malt failed to meet failed to meet vital health and safety checks by letting Mr Kinmond sign himself into the giant silo, the court heard.

BBC: Pauls Malt fined after worker lost leg in silo accident

That's a good sign they have your safety in mind.

CNN: Be ready for emergency at a crowded public gathering