The ideal situation for base table row storage of XML data is when the table has only one column of XML type and the maximum size of the XML document doesn't exceed the page size.
A thermometer often now, and more often back in the early 1800s, consists of a glass tube up which a columnof 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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He said: 'the smoke seemed to have an odd bloom to it at the baseof the column that was streaming south of the city.