Carmakers are beginning to build in these new safety features as standard equipment. = Carmakers are building these new safety features into new cars as standard equipment.汽车制造商开始把这些新的安全特性作为新车标准配置的一部分。

We've built bookshelves into the wall.我们已经把书架嵌进了墙里。

These ideas are built into the program/system/design.这些想法已融入计划/系统/设计中。

There are special provisions for bonuses built into the contract.这份合同对奖金有特别的规定。