[jī lěi]
(逐渐聚集) accumulation; accumulate
have accumulated a wealth of experience
积累了丰富的经验
accumulate first-hand data
积累第一手资料
the accumulation of knowledge
知识的积累
primitive accumulation of capital
资本的原始积累
patiently accumulate data
耐心地积累资料
[核子] build-up