The contact of block to block is the association of sentence to sentence, and the base blocks are sentences conditioned in the modes (1) and (2) to non-verbal stimuli.

• 砖与砖之间的接触相当于句子与句子之间的联系，底砖相当于通过模式（1）和（2）与非言语刺激建立起条件作用的句子。