marker beacon indicator

例句：

1. 1.The artist used markers to draw the outline of the building.
   艺术家用标记笔画出了建筑物的轮廓。
2. 2.The policemen marked the crime scene with their own markers.
   警察用自己的标记笔在犯罪现场做了标记。
3. 3. The students marked their homework with colored markers.
   学生们用彩色标记笔标记他们的作业。
4. 1. The lighthouse is a beacon for ships in the harbor.
   灯塔是港口中船只的引航灯。
5. 2. The beacon on the mountain was used to guide the hikers.
   山上的灯塔用来引导徒步旅行者。
6. 3. The beacon helped the pilot to find his way back to the airport.
   灯塔帮助飞行员找到返回机场的路。
7. 1. The thermometer is an indicator of temperature.
   温度计是用来指示温度的。
8. 2. The blood test results are an indicator of health.
   血液测试结果是用来指示健康的。
9. 3. The new policy is an indicator of the government's intentions.
   新政策是政府意图的指示器。