The paragraph as a connecting link between A and B is important.
这一段很主要,在A和B之间有承先启后的感化。
tell sb. the differences between A and B in sth.
告诉某人A和B在某方面的差别
One way to develop this communication between A and B is to develop DTDs (or schemas) that match the specific needs of A and B.
开发A和B之间的这种通信的一个方法是开发与A和B特定需要相匹配的DTD(或模式)。
Suddenly A goes down, or alternatively, the line between A and B is cut, which is effectively the same thing from B's point of view.
突然出现故障,或者,在A和B之间的线路被切断,这实际上是从B的角度来看,同样的事情。