The teams and groups to strengthen the control and management, indicating the nature or type of danger or hazard, standards, and other matters of attention, in order to alert the scene personnel.

各班组要强化控制管理，标明危险或危害的性质、类型、标准定量、注意事项等内容，以警示现场人员。

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The area should then be posted to prevent access and to alert personnel to the hazard.

在这样的地方张贴标志，以防止人员接近和警告存在危险。

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The automatic gas-off device of the gas cooker can alarm when the indoor gas reaches an alert concentration, and automatically close the gas secondary valve to get rid of potential safety hazard.

本发明可以在室内煤气达到警戒浓度后报警，并自动将煤气二级阀门关闭，解除安全隐患。

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The Coast Guard determined the trawler posed a threat to other ships navigating the area, and had been broadcasting the unmanned, unlit vessel's location to mariners to alert them to the hazard.

CNN: U.S Coast Guard sinks Japanese fishing trawler near Alaska

Anguilla established a 24-hour emergency operations center, developed multiple ways to receive tsunami warnings and alert the public, developed a formal tsunami hazard plan, conducted emergency exercises and promoted public readiness through community education.

UNESCO: IOC congratulates Anguilla on achieving TsunamiReady recognition | United Nations Educational, Scientific and Cultural Organization