sling thermometre

例句：

1. 1.We used a sling thermometer to measure the temperature of the air.
   我们使用一个投石器温度计来测量空气的温度。
2. 2. The sling thermometer was easy to use and accurate.
   这个投石器温度计使用起来简单且准确。
3. 3. The thermometer in the sling was broken, so we had to use a different one.
   投石器中的温度计坏了，所以我们不得不用另一个。