A tree is a connected graph with no cycles . 一个树是一个没有圈的连通图。
No , there was no cycling 不对,不是那档子事。
No cycling in the school 校内禁止骑车
No cycling in the school 校内禁止骑车
A typical kind of property that you might want to express , say , in a class invariant for a graph class , is that the graph has no cycles 比如在一个图类中,你可能想要表述的典型属性是该图没有回路。