读书摘要✂：
「SurvivaIGuide： How to Measure Remaining Sunlight With Your Hands http://bit.ly/2zZVF8J 」
「SurvivaIGuide： How to Measure Remaining Sunlight With Your Hands http://bit.ly/2zZVF8J 」
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How to Measure Remaining Sunlight With Your Hands