第三人称单数：builds in 现在分词：building in 过去式：built in
1.加入,插进(用料);埋入,装入
2.围以(房屋,围墙等)
1.to build something such as a piece of furniture so that it becomes part of a wall or room
2.to make something part of a plan, system, calculation etc.
buildinbuildinbuildin