square field picket fence reticle

例句：

1. 1. The roomis square and has four walls.
   房间是正方形的，有四面墙。
2. 2. The squareis the center of the city.
   这个广场是城市的中心。
3. 3. The square was decorated withcolorful flowers.
   这个广场被五颜六色的花装饰着。
4. 1.The farmer works in the field every day.
   农民每天在田里工作。
5. 2. The fieldsare rich in crops.
   这些田地里庄稼丰富。
6. 3. The farmer needs to plant new seedsin the field.
   农民需要在田地里种植新的种子。
7. 1. The policemen were picketing at the border.
   警察们在边境巡逻。
8. 2. The pickets were holding a peacefulprotest.
   守卫们正在举行和平抗议。
9. 3. Thepickets were keeping an eye on thecrowd.
   守卫们正在监视人群。
10. 1. The fence separates the twohouses.
    这道篱笆将两所房子分开。
11. 2. The fence was old and rusted.
    这道栅栏旧且生锈了。
12. 3.The fence was tall enough to keep theanimals out.
    这道栅栏足够高，可以阻止动物进入。
13. 1. The artistdrew a reticle on the canvas.
    艺术家在画布上画了一个小圆点。
14. 2. The scientist used a reticle tomeasure the distance.
    科学家用一个小圆点来测量距离。
15. 3. The reticle helped theastronaut to focus his camera.
    小圆点帮助宇航员聚焦他的相机。