大型机多年来的一个关键特征是在硬件和软件级别具有可靠的安全性。
A key attribute of the mainframe over the years has been its rock-solid security at the hardware and software level.
工厂人员和设备可靠性的安全是该工厂的关键问题，并为该合同的签订发挥了重要作用。
The safety of personnel and equipment reliability are key issues for this plant, and played a significant role in the awarding of this contract.
高可靠软件，特别是安全攸关软件，其关键操作往往使用概率非常小。
In highly reliable software, especial safety-critical software, the critical operation's use probability is very small.
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