经济~ economic development || 人的~ human development || ~很快 develop quickly ~快/慢 improve quickly/slowly || 有很大~ make great progress || 社会~ social progress make progress, ambitious to improve oneself ~很 快 quick progress || 有/ 没~ have/ haven’t made progress move step by step advance by leaps and bounds advance bravely go backwards fall back fall behind, retrogress degenerate, atrophy lag behind turn back the clock decline degenerate, become depraved corrupt ups and downs be in the lead, lead take precedence, have priority grab, take anticipate, preempt strive to be first compare unite be of one heart get together meeting, gathering, party reunite family reunion leave, say goodbye to part forever ~两年 be apart for two years || 跟朋友~ part with friends || 这次 ~ this parting separate break up family members living apart