各种各样的伸缩接头被安装在煤气的总管道上了.Expansion joints of various kinds are fitted on gas mains.水是从总管道来的.Water is supplied from the mains.新房子(的水电)还没接上总管道.The new house is not yet connected to the mains....
His defection to the other side was the ultimate betrayal.他变节投向另一方是最终的背叛.Yet he could not bring himself to regret Draco, because that, too, would be a betrayal.他不能让他自己开始为Draco后悔, 因为即使这样, 也是一种背叛.She felt that what she had...