Because the airport is often congested, aircraft are frequently directed to circle over the capital, increasing the misery.
因为机场往往“机”满为患，飞机频繁地被告知必须在首都上空盘旋打转，这徒增噪音之大给人们带来的痛苦。
2
We were directed to form a circle--which we did.
我们按要求围成一个圆圈。
3
Circle matrix is the algebraic description of all the resource circles in a directed graph, and equivalence reciprocally to that one of complementary set and T-characteristic vector.