column of mercury（水银柱）是什么意思？音标发音+图解场景

水银柱 /ˈkɒlʌm ɒv ˈmɜːkjʊɹi/ n

English: column of mercury · 水银柱

释义：Quantity of mercury that is contained in the capillary bore; its height varies with the temperature.

这个词出现在以下图解场景（1）