为充分利用向量空间，克服"假溢出"现象的方法是：将向量空间想象为一个首尾相接的圆环，并称这种向量为循环向量。存储在其中的队列称为循环队列-To take full advantage of vector space, to overcome the " false overflow"　phenomenon is: the vector space of imagination for an end to end ring, saying such a vector for the loop vector. Stored in a queue which called the cycle queue