291：水果为什么这样甜？
· 39 min
Episode 291：水果为什么这样甜？
0:00
38:58
听节目前，先思考这样一个问题：甘蔗、柠檬、西瓜、牛油果、番茄，以上这些哪些属于水果？进一步的问题则是，什么样的东西才能被称为水果？从演化史和文明史来看，水果又是如何一步步演变成如今样子的呢？
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