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21.对产生有利/不利的影响 exert positive/ negative effects on 22.利远远大于弊 the advantages far outweigh the disadvantages. 23.导致，引起 lead to/ give rise to/ contribute to/ result in 24.复杂的社会现象 a complicated social phenomenon 25.责任感/成就感 sense of responsibility/ sense of achievement 26.竞争与合作精神 sense of competition and cooperation 27.开阔眼界 widen ones horizon/ broaden ones vision 28.学习知识和技能 acquire knowledge and skills 29.经济/心理负担 financial burden / psychological burden 30.考虑到诸多因素 take many factors into account/ consideration | 
