基础;构成要素
the basic things that are put together to make something exist
  Science and the arts are the building blocks of a good education. 科学和艺术是良好教育的基本要素。 
 Technologies like these are potentially the building blocks for a carbon-free future.
 It was her firm belief that the best building blocks for a stable society were families. 
The building blocks of a new vaccine have been identified.
 During these critical years, the basic building blocks of literacy are acquired.
 See also: building block