When brake disc wears enough to affect safety in operation or can 't adjust clearance, this is called failure.

当制动盘磨损到影响安全操作或制动间隙无法调节时，即为失效。

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The results indicate that the high precision, stable running and safety in operation can be offered by the new instrument.

结果表明：该装置具有测量精度高，设备运行稳定，实验安全可靠等特点。

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It has proved that the retrofitting scheme is safety in operation with a little workload and less expenses. The retrofitting scheme is valuable and practical.

针对存在的技术问题，对断路器控制回路进行了改造。实践证明，该方案运行安全可靠，改造工作量小，改造费用低，具有较高的使用价值。

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It took the help of a dozen or so firefighters and others to lift the horse to safety in an operation that took about three hours.

BBC: Horse Wesley rescued upside down in hole in Kinmel Bay

Along with police and fire crews, the rangers battled to get the surviving cows to safety in a rescue operation that took four hours.

BBC: Rescued cow at Cefn Sidan beach in Carmarthenshire

The review says the HSE investigated and in 2011 found that "in their view, the strategic management arrangements in operation at Bronglais Hospital in respect of health and safety were wholly ineffective".

BBC: Bronglais Hospital