The pots are wide at the base and tapered at the top.

这些壶底部粗，顶部细。

《牛津词典》

He later said that energy would come from a full-sized stone pyramid 755 feet wide at the base.

他接下来说能量来自一个全尺寸的石头金字塔，有755英尺宽。

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Found as deep as 100 feet from the surface, the springs lie at the base of craters as large as 50 feet wide and 65 feet deep.

据发现，距离海水表面100英尺深处，在凹坑基部分布着泉眼，50英尺宽，65英尺深。

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Competitions are usually only open to women, who must race in heels that are at least 7cm high and no more than 1.5cm wide at the base.

BBC: High-heel racing for a cause

The tower, on East 22nd St. between Broadway and Park Avenue South, would be only 50 feet wide at the base but would expand like a slender champagne flute and be wider at the top, a rendering reviewed by The Wall Street Journal shows.

WSJ: For Developer, 3 Could Be Charm

Professor Garvey envisages a cone-like structure stretching 50 meters wide at the top to around 80 meters across at the base.

CNN: Where to store wind-powered energy? Under water!