缓慢: slow, slow-moving...
方便: convenient, suitable, to facilitate, to make things easy, having money to spare, (euphemism) to relieve oneself...
重视: to attach importance to sth, to value...
继而: then, afterwards...
苦力: bitter work, hard toil, (loanword) coolie, unskilled Chinese laborer in colonial times...
息息相关: closely bound up (idiom); intimately related...
发扬光大: to develop and promote, to carry forward, to bring to great height of development...
辩证: to investigate, dialectical...
盒子: box, case...