The severity can be marked as info (purely for information), warning, error, critical (a serious problem that needs addressing), and even emergency (the system needs urgent help).
可以将严重性标记为信息（纯信息）、警告、错误、重要（需要解决的严重问题）甚至紧急（系统需要紧急帮助）。
Although the error message "SQL1042C An unexpected system error occurred" might sound very critical, do not worry.
尽管错误消息“SQL 1042c An unexpected system error occurred”听起来非常严重，但是不必担心。
The critical design for the control system of ship-borne electro-optical equipment is how to isolate external disturbance and reduce the dynamic lag error.
在舰船摇摆条件下提高光电跟踪系统对目标动态跟踪精度，其控制系统设计的关键技术是隔离扰动和减小高速跟踪时的动态滞后误差。
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