某一

On the basis of the roundly summing-up of the research on NSP inlands and overseas, the existed problems and developing trends are analyzed. The instructional meaning of estimating the annual load is higher than forecasting the load of sometime or some section. Aiming at the scarcity of data and the difficulties in building mechanism model, hydrological methods are used to calculate the annual load of NSP because the data needed in statistic methods is less. The NSP brought by livestock and poultry is also numbered and differentiated.

本文在对国内外非点源污染模型的研究进行较为全面的总结，分析存在的问题和发展趋势的基础上，针对非点源污染数据资料稀缺，机理模型难以建立而统计模型所需资料相对较易于获得，计算简便直观，并且在水环境规划管理中对年负荷量预测、估算的指导意义要大于对某一时点、某一断面的负荷量的模拟预测的情况，对非点源污染年负荷量估算时运用水文分析方法计算非点源污染年负荷量，并对畜禽养殖带来的非点源污染进行量化区分。

We describe the motion of the fluid by specifying the density r and the velocity v at the point at the time t. We focus attention on what is happening at a particular point in space at a particular time, rather than on what is happening to a particular fluid particle.

我们描述流体运动的具体密度住宅和速度第五在点的汤匙当时正在发生什么事情，我们集中精力在某一特定时间点的空间，正在发生什么事，而不是某一粒子流。

On a certain day at a certain hour, we will pull into the station.

在某一天的某一时刻，我们将到达那里。

On a certain day at a certain hour, we will pull into the station.

在某一天的某一时刻，我们将走到车站。

On a certain day at a certain hour, we will pull into the station.

在某一天的某一时刻，我们将到达终点。

On a certain day at a certain hour, we will pull into the station.

在某一天的某一时刻，我们将会抵达入站！

On a certain day at a certain hour, we will pull into the station.

某一天的某一时刻，我们将涌入车站。

On a certain day at a certain hour, we will pull into the station.

在某一天的某一时刻，我们将会抵达进

On a certain day at a certain hour, we will pull into the station.

在某一天的某一时刻，我们将会抵达进站。

On a certain day at a certain hour, we will pull in the station.

在某一天的某一时刻，我们将会抵达进站！

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷