The United States is much richer than it was 50 years ago, but this has produced no measurable increase in overall happiness.
现在的美国比50年前富有，但是民众的幸福感却并没有很大的提高。
This has produced a blending of different ways of life that many Americans find disturbing.
这就导致了不同生活方式的交融，对此，不少美国人感到不安。
This has produced a blending of different ways of life that many Americans find disturbing.
这就导致了不同生活方式的交融，对此，不少美国人感到不安。
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