n.事情,事件,情况
Have a good met an emergency and deal with urgency circs'ability.
有良好的应变和处理紧急情况的能力.
The ring sum of two circs is a circ.
两个广义圈的环和是一个广义圈.
Need to treat distimctively for dissimilarty circs about the rural highway's design.
山区公路的超高设计有必要针对具体的情况区别处理.