发球区

The returner almost has to return down the line then (where the net is higher and more difficult to cross), which sets up Nadal's own backhand for a powerful cross-court shot that almost demands a response to his forehand – and you know what happens then. BOOM!

另外二区的发球则要更注重切削，这样好拉开右手对手的站位，这种情况下对手的回球更多会选择直线，也就是网带相对要高的地方，纳达尔则可以运用反手回出一记斜线，对手接下来的回球可能正好送到他的正手，紧接着会发生什么就可想而知了！

In the case of Lack of Progress, the ball will be moved to the nearest neutral zone.

&没有进展&发生后，球将移到最近的发球区。

I f this occurs again the ball will be moved to the centre of that neutral zone.

如果这种情况再次发生，球将被移到发球区的中心。

2 After a ball is considered out of play, it will be moved to the nearest neutral zone to the disadvantage of the last robot that touched it.

如果球出界，它将被移到最近的发球区，且不应对最后触球的机器人有利。

Ie the nearest neutral zone in the direction that the opposition are kicking.

如放置在敌方进攻方向的最近发球区。

"Thank you," said a smiling Obama, clad in brown slacks and a black shirt, to a cheering crowd as he stepped up to the tee to fire off his opening drive.

奥巴马身着棕色休闲裤和黑色T恤衫。在前往发球区击出第一杆之前，奥巴马微笑着对欢呼的人群说：&谢谢&。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。