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1·The study shows that ignorance can be safer than carnal knowledge when predators are on the prowl.

这项研究表明当捕食者在虎视眈眈四处徘徊时，无知比感性经验更安全。

2·Experiment a method better than general of observation method, consumedly strengthen the active that people obtain sensitive faculty material and feeling carnal knowledge.

试验方法优于一般的观察方法，大大加强了人们获取感性材料和感性经验的主动性。