第四单元

Unit four

Into the barracks -- direction and location

(走进军营——方向与位置)

Lesson one

1. What position is jack in?

小强在什么位置？

2. When determining their positions, vertical rows are called columns and horizontal rows are called rows.

确定位置时，竖排叫作列，横排叫作行。

3. Determine which column to count from left to right, determine which row to count from front to back.

确定第几列一般从左向右数，确定第几行一般从前往后数。

4. Can you show the position of roaches accurately and concisely?

你能既准确又简明地表示出小强的位置吗？

5. Think about it, how to use a pair of numbers to show Xiaogang's position?

想一想，怎样用数对表示出小刚的位置？

6. What about other students?

其他同学的呢？

7. The position of jack is (3,2) in pairs. Can you mark his position on the map?

小强的位置用数对表示是（3,2），你能在图上标出他的位置吗？

8. Can you mark the position of Xiao Jun and Xiao Li on the map?

你能在图上标出小军和小力的位置吗？

Lesson two

9. Where is the Red Army position in the headquarters?

红军阵地在指挥部的什么位置？

10. We use the headquarters as an observation point.

我们以指挥部为观测点。

11. The Red Army position was roughly northwest of the headquarters.

红军阵地大致在指挥部的西北方向。

12. One centimeter here means 10 kilometers, so the Red Army position is 10 kilometers northwest of the headquarters.

这里的1厘米表示10千米，所以红军阵地在指挥部的西北方向10千米处。

13. The Red Army position was 10 km 50° W of the headquarters.

红军阵地在指挥部北偏西50°方向10千米处。

14. Knowing the direction and distance can determine the position of the object.

知道了方向和距离就能确定物体的位置。

15. How do I get from headquarters to the blue camp?

从指挥部到蓝军宿营地怎么走？

16. From headquarters go north by east to the blue position and then east to the blue camp.

从指挥部先向北偏东方向走到蓝军阵地，再向东走就可以到蓝军宿营地。

17. Please state the route.

请同学陈述一下路线。