请翻译下面文字 拒绝机器!

请翻译下面文字 拒绝机器!
本文以X江中下游防洪系统为对象,根据X江中下游水系复杂,涉及范围广,地域差异显著,空间尺度变化大,区域组成复杂多样,且耦合作用强,相互影响,相互制约等实际情况,在总结前人研究X江中下游水沙数学模型的基础上,从探索X江中下游水沙输运规律包括河道水沙和湖泊水沙运动规律入手,在数值模拟框架内对区域内各种水力单元或环节的计算模式,包括分流口、汇流口水沙计算模式,河网动边界及其计算模式,湖泊泥沙输沙率计算模式,动床阻力计算模式和河道横断面变形计算模式等进行了深入研究,提出了构建了X江中下游水沙输运数学模型的总体设想及其相关环节的计算模式.
动床阻力：resistance of movable bed
横断面：cross-section
输沙率：sediment transport rate
动边界：movable boundary
河网：river network
汇流口：junction
分流口：distributary estuary
水力：waterpower
数值模拟： numerical simulation
水沙：stream and bedload
耦合：coupling
水系：water system
防洪：prevent flood
翻译成英语！！

The main body of a book take that lower reaches prevents flood systematically in X river as marriage partner,lower reaches river system complicated ,relates to range according to X in the river to expand,region difference is notable ,space dimension changes greatly,the various,and coupled complicated area made up of effect strong ,influences each other,mutual restraint waits for reality ,start with to probing the below-average X river Youshui sand losing the luck law including the runway water sand and lake water sand characteristics of motion on basis studying below-average X river Youshui sand mathematic model in summary prehominid,Simulate the frame inner calculation pattern to the various area inner waterpower element or the link in numerical value,the sand calculates a pattern including the diffluence mouth ,junction saliva ,the river network moves border and their calculation pattern ,the lake silt loses sand rates calculation pattern ,move bed resistance calculation pattern and runway cross section deformation calculation pattern etc.having been in progress studying in a deepgoing way,calculation pattern having suggested that the sand loses the general idea transporting mathematic model and their relevance link having structured below-average X river Youshui.