To construct or include as an integral part of
建造，建立：作为一个整体来建设或包括在内
a wall with shelving that was built in; build stability into the economy.
建造有架子的墙；建立经济的稳定性
To use as a basis or foundation
依靠，指望：以…为基础
We must build on our recent success.
我们必须依靠现有的成功
To develop or increase in stages or by degrees
扩大，集结，支持：逐步或分阶段的发展或增加
built up the business; building up my endurance for the marathon.
扩大企业；为跑马拉松而增强我的耐力
To accumulate or collect
积累或收集
sediment building up on the ocean floor.
海底积累的沉积物
To bolster
支持，增加，树立
build up the product with a massive ad campaign; built up my hopes after the interview.
通过大量的广告活动来树立这种产品；在面试后增加我的希望
To fill up (an area) with buildings.
在（一个地区）盖满楼房
become ever more hopeful or optimistic about something
对…抱有更大希望（变得更加乐观）
(figurative)without reliable foundations or any real substance
(喻)不切实际；不牢固；不稳妥