Question

英语达人们进来翻译一段 中翻英

瀑布模型(waterfall model)的优点是为项目提供了按阶段划分的检查点，缺点为在项目各个阶段之间极少有反馈。
迭代模型（RUP）的有点是加快了整个开发工作的进度。因为开发人员清楚问题的焦点所在，他们的工作会更有效率，缺点是开发耗时、

相比两者，迭代和瀑布的最大的差别就在于风险的暴露时间上。由于瀑布模型的特点（文档是主体），很多的问题在最后才会暴露出来。与传统的瀑布模型相比较，迭代过程具有以下优点： 由于用户的需求并不能在一开始就作出完全的界定，它们通常是在后续阶段中不断细化的。因此，迭代过程这种模式使适应需求的变化会更容易些。而且因为软件越发复杂，不可能一次性就能把软件做的完整，而RUP可以用迭代开发来更好的应对变化，使软件的实践更加完整。

Answer 1

The waterfall model (waterfall model) advantage is provided for the project by stages division checkpoint, defect in project between stages for rarely has feedback.
Iterative model (the RUP) a bit is to accelerate the whole development work schedule. Because developers the focal place of the clear, their job more efficient, defect is time-consuming, development

Compared with both, iterations, and the biggest difference of the waterfall is that risk exposure time. Due to the waterfall model features (document is main body), a lot of problems in the final will be exposed. The waterfall model with traditional compared, the iterative process has the following advantages: because the user's needs and not made at the outset the definition of completely, they are generally in the subsequent stages in the continuous specification. Therefore, the iterative process, this pattern that adapt to the change of demand will be easier. And because the software increasingly complex, could not one-time can complete the software, and can be used iterative development RUP to better cope with change, make software practice more complete.

Answer 2

The advantage of waterfall model is it supplies phased test points for the item and the disadvantage is there is less feed back among the phases of the item.
The advantage of RUP is accelerating the process of the total development.Since the developers know which is the focus, they will work more effectively. The disadvantage is development time consuming.
By comparsion, we found that the biggest difference between waterfall and RUP is the emerge time of risk.because of the character of waterfall model, most of the problems will emerge at last phase.Compare with the traditional waterfall model, RUP has the advantages as follows:
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