船员在船舶航行时或作业时，请保持救生设备的佩戴，以保证人员安全。

When the ship is sailing or working, please keep wearing the life-saving equipment, to ensure the safety of the staff.

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列车在自然通风隧道内发生了火灾，如何控制火灾烟气扩散以保证人员安全疏散，是值得深入研究的课题。

When the train fire occur inside the tunnel with natural ventilation, how to control smoke spreading in order to ensure the safety of evacuation, is a worth deeply research project.

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既保证人员又保证受试样本的安全。

To ensure the safety of personnel and tested samples.

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