高速UBB标签,转换引擎性能极高，对全文只扫描一遍，且和UBB标签的种类数量无关，因此可以任意添加新的UBB标签而不必担心性能会下降,容错性非常好-- UBB label, a high performance engine conversion, only to scan the transcr ipt again, but UBB tags and the number of unrelated types, it can arbitrarily add new UBB label with