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。
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According to the type of liquid inglass, metal well thermometer can be divided into two series: WNG series (mercury) and WNY series (organic liquid).