A thermometer often now, and more often back in the early 1800s, consists of a glass tube up which a column of mercury or alcohol can travel from a reservoir at the base.
现在常见的温度计由一个玻璃管和一个位于底部的贮液槽组成，贮液槽中的水银或酒精沿玻璃管上升形成液柱。
2
Put a food thermometer in a glass of water on the middle shelf, where the air temperature is most accurate. Leave it there overnight and take a reading in the morning.
将食物温度计放在一杯水中，摆在一架子的中层——温度最准确处，过夜后，于第二天早上读取度数。
3
How can you measure the temperature of a glass of water with a thermometer?