What is the life expectancy of Earth?求翻译

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WhatisthelifeexpectancyofEarth?求翻译WhatisthelifeexpectancyofEarth?求翻译WhatisthelifeexpectancyofEarth?求

What is the life expectancy of Earth?求翻译
What is the life expectancy of Earth?求翻译

What is the life expectancy of Earth?求翻译
地球生命的周期是多少?