简洁版：to follow the principle of going from simple to complex, from part to whole
华丽版：to abide by the fundamental principle of going from simplicity to complexity, from the local to the aggregate sum
关于楼上说的simpleness和complication：前者是比较不地道的，而后者一般意为“不良且未被预知的后果”
而且楼上散文的语法结构也不对，没能表达楼主的完整意思。