客货运输的主要流向是长三角方向。
Passenger and cargo transportation flow is in the direction of the Yangtze River Delta region.
在西南方向,多瑙河三角洲形成了与罗马尼亚的边界。
To the southwest the delta of the Danube forms the border with Romania.
作为通往密西西比河三角洲南方和西南顶端方向的航道,(图像中左及左下角)的明亮的水道为船只提供了进入墨西哥湾的通道。
The bright waterways known as the South and Southwest Passes of the tip of the Mississippi River Delta (image center left and lower left) provide passage for ships into the Gulf of Mexico.
This vector i prime has got a horizontal part, This kind of trigonometry you should know all the time.
矢量 i' 有一个水平方向的分量,这类三角关系你们应该已经很熟悉了
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