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大停顿// 小停顿/ bold 加强语气
Life expectancy预期寿命 has increased dramatically戏剧性的,大大地 in the last century.// Most people these days如今 will live for over 70 years old./ This is more than double翻倍 the lifespan寿命 of the average human in the 17th century.// We can attribute归功 our longevity长寿 to advances进步 in medicine and lifestyle./ While everyone agrees that living longer is wonderful,/ overpopulation人口过剩 is becoming a serious environmental concern环境问题.
By 墨村小学霸Mel大停顿// 小停顿/ bold 加强语气
Life expectancy预期寿命 has increased dramatically戏剧性的,大大地 in the last century.// Most people these days如今 will live for over 70 years old./ This is more than double翻倍 the lifespan寿命 of the average human in the 17th century.// We can attribute归功 our longevity长寿 to advances进步 in medicine and lifestyle./ While everyone agrees that living longer is wonderful,/ overpopulation人口过剩 is becoming a serious environmental concern环境问题.

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