water temperature indicator

例句：

1. 1. The thermometer is an essential tool for measuring watertemperature.
   温度计是测量水温的重要工具。
2. 2.The fisherman used a thermometer tocheck the water temperature before diving into thelake.
   渔民使用温度计在跳入湖前检查水温。
3. 3. The doctor recommended usinga thermometer to ensure the water temperatureis safe for swimming.
   医生建议使用温度计以确保水温适合游泳。