改进: to improve, to make better...
账: account, bill, debt...
光缆: optical cable...
大家庭: extended family, big family, harmonious group...
掉队: to fall behind, to drop out...
发扬: to develop, to make full use of...
平均: average, on average, evenly, in equal proportions...
赖: rely; poor; bilk ; disclaim...
音节: syllable...
衬托: to set off...
