用产品经理的心态对待咖啡，不断迭代好喝的咖啡。公众号：咖啡平方
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技术核心：小数据量样本、高数据使用效率
Jim Lovell, Apollo 13 astronaut, dies aged 97
"So if the Dutch want to maintain their quality of life, they have to increase productivity or increase their labour supply."