性交；性关系

性交; 性关系

gain knowledge───获得知识

local knowledge───[计]局部知识

cultural knowledge───文化知识

current knowledge───现有知识

general knowledge───常识；各方面的知识

medical knowledge───医理

apply knowledge───应用知识；运用知识

basic knowledge───基础知识，基本知识

common knowledge───n.常识；大家都知道的事

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。

Have carnal knowledge of last 13 day the dilatation and curettage.───刮宫后13天发生性关系.刮宫后13天发生性关系.

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。

The cyber acquaintance carnal knowledge of and, how big is the probability that infection Ai grows?───和网友发生性关系, 感染艾滋的几率有多大?