能不能帮我翻译一段话
Cross-connection A cross-connection is the way portable water may get metimes this type of plumbing is connected directly to raw sewage pipes.In the same of a back-up the raw sewage can contaminate the portabe water supply.This can happen because there is no way for the dirty water to escape. A good example of a cross -connection is when a hose is hooked up to a faucet.If any back siphoning occurs,like when the bucket being filled stars to over flow ,then the cleaning solution from the bucket may get suckef up into the fauct and contaminate the cuum breakers should be installed on faucets designed for hose attachment .Anther example would be if the faucet is so long that it would hang into a ful sink of water,possibly taking in the dirty water frome the sink. An air gap must be installed at the faucet ( between the faucet and the top of the sink when filled with water ) and at the drain.
交叉连接 交叉连接做法是导致饮用水遭到污染的原因。这一类型的管线有时直接被连接到未处理污水管线上，如这种管线和未处理污水管线位于同一后备系统内，未处理污水可能也会污染饮用水，因为没有排污水的渠道，所以就有可能发生污染。水管被套到某一水龙头上，就是一种典型的交叉连接。如果发生倒吸现象，比如说：水龙头下面的水桶满了，水溢出来，水桶内的清洁剂就可能通过水管被倒吸入水龙头，污染饮用水。对于下面和水管相连的水龙头，应该安装真空阻断器。另一种情况是：水龙头过长，容器接满水后水龙头会浸入水中，可能也会吸入容器内的污水。必须在水龙头上安装空气隔离器来解决问题（位置应在水龙头和容器接满水时的水平面之间）,排水处也要安装。
答：1.on:是静态的方位介词,仅仅表示一个状态“在....上”onto:是动态的方位介词表示一个动作的趋向“向..上;到...上”在美国英语中常用onto,英国英...详情>>
答：I haven't window molding catalogs on hand. catalogs 产品目录 haven't ~ something ~ o...详情>>
问：head+hand+hardworking=success 什么意思
答：head+hand+hardworking=success 脑+动手+努力工作 = 成功详情>>
