求翻译：50年前和现在的差别很大，50年前人们文化水平低，科技落后，甚至吃穿都是问题，但现在和50年前大不相同，现在人们的生活水平提高，科技更加发达，社会更加和谐，物质生活和精神生活丰富是什么意思？

50 years ago and now a lot different 50 years ago, people with low educational level, technological backwardness, and even food and clothing are the problem, but very different from now and 50 years ago, and now people's living standards improve, more advanced science and technology, social more har

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50 years ago, and now the difference is very large, 50 years ago, and lower level, science and technology behind, and even food and clothing are all problems, but 50 years ago and now is quite different, people now living, science and technology more developed, more harmonious social, material and s

50 years ago and now a lot different 50 years ago, people with low educational level, technological backwardness, and even food and clothing are the problem, but very different from now and 50 years ago, and now people's living standards improve, more advanced science and technology, social more har