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》

But it will build on your current knowledge base and give you the background you need.

但是它会建立在你现有的基础知识上，并提供一些你需要了解的背景知识。

youdao

It then adds that item to the knowledge base and starts again.

然后，它把新知识添加到知识库中并重新开始。

youdao

The preparation had a sugar base and was similar to gelatin, a food product.

VOA: special.2010.04.06

We can do that by intercepting our observation with the date base and knowledge we required, the whole color map.

通过截取我的观察结果,分析数据库，所需的知识，以及整个彩色图画。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

In this case, to optimize for the best of the whole community and the whole user base and over the long term and that's important too, your long over short term.

在这个前提下,去寻求整个社会,以及所有用户的长远利益的最大化,这十分重要，我们寻求长期利益，而非眼前利益。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选

Eccles believes that her company will continue to expand its user base and payouts.

FORBES: Fantasy Sports Service, FanDuel, Secures $11 Million Investment; Includes Money From Comcast Ventures

So were the paths between the plate and first base, and third base and home.

NPR: Dbacks, Rangers Postponed By Unplayable Field

McCain has been battered by the party's conservative activist base and by talk-radio hosts.

CNN: McCain sweeps Potomac primaries; conservatives still cool