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同样是吸血动物，蚊子人人喊打，水蛭却被用爱供养
source link: https://tech.sina.com.cn/d/a/2018-08-20/doc-ihhxaafz0717404.shtml
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来源：SME科技故事想必大家都试过：在蚊子酣畅淋漓地吸血时，猛一巴掌打爆它，再望着掌心一点红，思考着这血算谁的。其实这个场景可以再升级一下：当你在溪边戏水后上了岸，却发现一只已经饱食鲜血的水蛭，你抓起了它，它也回报你一手鲜血。这一手鲜血不仅
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