网站由一个消息提醒系统支持，问题得到答案的平均时间为14分钟。
The site is supported by a system of notification alerts, and the average question on Piazza will receive an answer in 14 minutes.
在世界范围内，直接或间接地由电压稳定造成的停电事故很多，电压稳定问题得到了日益的关注。
A large number of blackouts are influenced by voltage instability directly or indirectly in the world, so voltage instability is given more and more attention.
批判性思维的重点是重新问题，以便正确的问题得到处理，区分系统模式由随机事件和确定可接受的风险替代决定。
Critical Thinking focuses on reframing issues so that the right problems are addressed, distinguishing systematic patterns from random events and identifying acceptable risks in alternative decisions.
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